It takes something to shock Derryn Hinch.

But an ex-Melbourne cop who now hunts down evil pedophile rings in Asia has done it.

Over a cup of coffee in late 2015, Glen Hulley sat down with Hinch and told him terrible stories about Australians sexually abusing kids in Asia.

The details of that conversation would haunt and repulse the soon-to-be Senator.

Hulley revealed to Hinch how convicted Australian pedophiles were boarding low-cost flights and travelling freely into Asian countries to take advantage of impoverished children.

He described how fixers would offer up young boys and girls for less than the price of a movie ticket.

The numbers, which had been leaked to Hulley from the Australian National Child Offender Register (ANCOR), were astonishing.

Homeless children play on a staircase at the Light Railway Train Carriedo station in Manila. Photo: AFP

Some 250 registered child sex offenders had entered the Philippines from Australia in 2014.

On average, a staggering 25 registered pedophiles were pouring into Bali each month from Australia.

Within hours Hinch had written a blistering 640-word blog post, describing his 2015 sit-down with Hulley as "one of the most disturbing coffee breaks of my life".

Hinch wrote he wanted to know how pedophiles could take child rape holidays. He blasted it "a scandal".

On Tuesday new laws were passed in Australia to strip convicted pedophiles of their passports and block them from travelling overseas.

Justice Party Senator Hinch called it one of the greatest days of his life.

Hulley told Nine.com.au it had taken six months to set up that coffee break with Hinch, so he "decided to try and make the most of it".

On top of the alarming travel statistics, Hulley informed Hinch of his work as a pedophile hunter, tracking down Aussies and other westerners in Thailand, the Philippines and Indonesia.

"He looked shocked," Hulley said.

Night scene in Manila's red light district. Photo: AFP

Glen Hulley's ProjectKarma works with local police in south-east Asia to hunt down pedophiles. Photo: Supplied

In 2013 Hulley set up ProjectKarma, a charitable organisation that assists police in South-East Asian countries to investigate child abuse and pedophiles.

He has played a role in bringing some of Australia's worst pedophiles operating in Asia to justice.

Those vile men include Peter Dundas Walbran, Robert Fiddes Ellis and Peter Gerard Scully , an online child porn kingpin also accused of murdering a 12-year-old Filipina and abusing an 18-month-old infant.

Hulley explained to Nine.com.au how he had infiltrated online pedophile networks in the deep and dark web.

Scouring those clandestine forums, Hulley has developed intelligence on how Australian abusers were meticulously planning every detail of their sex holidays in Asia.

"These people don't come over to these countries and then work out what they are going to do," Hulley said.

"They do their research first. They know where to go, they know who to see, they know how much they have to pay."

They even know how much they will need to pay in bribes to corrupt cops if they get caught, Hulley said.

It is a vicious cycle of poverty, vulnerability and exploitation. Stuck in the middle are young kids.

Local families will regularly "palm out one of their children" to secure enough income for a year, Hulley told Nine.com.au .

"As abhorrent as that might seem to people in first world countries like Australia, it is a reality when you've been brought up in generations of poverty and this is a way out."

Hulley described how Australian sex offenders will continue to pay local families even when they depart Asia and head home.

That way, when they return to Asia for another holiday, pedophiles will immediately continue their abuse of the victimised child.

Affected boys and girls will often run away from home, becoming street kids or falling under the care of over-whelmed local orphanages.

Hulley told Nine.com.au about an abused boy in a Balinese orphanage who hadn't uttered a single word in three years, so badly had he been molested.

"That's just one example of many," Hulley said.

Robert Fiddes Ellis who is known as 'Australia's worst paedophile' . Photo: AAP

The former Melbourne policeman welcomed the stringent new passport laws, believed to be a world first.

He invited Australians who were concerned about the impinging of civil liberties through taking away sex offenders' passports to join him in Asia.

"They've probably never walked into a village and seen how these people have to live, seen how these children have to live," Hulley said.

"I guarantee you they will never have seen the trauma of a child chained to the floor. I have."

Pedophile tourism, child trafficking and the rise of live-streaming of online abuse in Asia is a multi-billion-dollar industry.