A mortician in Bali has been instructed to inscribe the names and dates of death for the Bali Nine duo and others due to face an Indonesian firing squad.

The mortician, B. Suhendroputro, was pictured yesterday stencilling crosses for Andrew Chan and Myuran Sukumaran as well as foreign nationals from Brazil, Nigeria and the Philippines who are also on death row, News Corp reports.

Indonesia's Attorney General HM Prasetyo has condemned Bali Nine duo Andrew Chan and Myuran Sukumaran to die by the end of the month. (9NEWS) (9NEWS)

All crosses were dated 29.04.15, confirming the inmates will be executed after the stroke of midnight on Wednesday morning.

The crosses reportedly will be placed upon their coffins, for collection by families after the Indonesian authorities hand over the corpses.

Sukumaran and Chan were officially given 72 hours warning of their executions on Saturday.

After spending some of his final hours with his brother, Chinthu Sukumaran said his brother's last wish was to paint for as long as possible.

Myuran Sukumaran reportedly wants to spend last days painting. (9NEWS) (9NEWS)

"He's found peace with what may happen but he and we all feel that this is a grave injustice and it did not have to be this way and it still doesn't have to be this way," he told reporters.

Sukumaran’s lawyer has taken a more disturbing self-portrait from his cell, depicting the artist shot through the heart. (Supplied)

Sukumaran also signed one of his three latest self-portraits "72 hours just started".

Their lawyer, Julian McMahon, took a fourth more disturbing self portrait from his cell, depicting the artist shot through the heart.

His mother Raji and sister Brintha also visited yesterday, making the sad journey with Chan's mother Helen, brother Michael and fiancée Feby Herewila and other friends.

Myuran Sukumaran's signed self portraits: "A bad night's sleep". (9NEWS)

Mr Sukumaran said they asked Joko Widodo to show the same mercy he'd asked for his own citizens on death row overseas.

"Please, please show mercy," he said.

"There are nine people with families that love them.

"That's mothers, fathers, sons, daughters, brothers and sisters.

"We ask the president to please use his powers to intervene and save their lives."

Mr Chan said his brother's only wish would be to go to church with his family in his last days.

"The two boys are still holding up pretty well considering they feel this is injust (unjust) to what has happened over the last ten years with their whole case," he said.

"Somewhere in the legal system for Indonesia there's got to be mercy and the president needs to show that now.

"He's the only one that can stop it and it's not too late to do so."

Coffins and crosses marked with the names of the condemned have been seen arriving. (Supplied)

It's reported only nine of the 10 prisoners Indonesia had readied for execution will face the firing squad, with Frenchman Serge Atlaoui granted a reprieve.

Mr Atlaoui apparently won a reprieve based on an administrative matter.