The Australian Federal Police must take the blame for the two Bali Nine ringleaders being on death row and do everything to save them, a lawyer close to the case says.

Bob Myers, a barrister and family friend of Bali Nine drug courier Scott Rush, tipped off the AFP in 2005 about the attempted heroin run from Bali to Australia. He said he now feels "betrayed".

Executions delayed: Andrew Chan and Myuran Sukumaran, on death row, have still not been given a date for their executions. Credit:AP

The AFP assured him they would approach Rush before he left the country, he said. Instead, the AFP relayed the names, dates of birth and passport numbers of the Bali Nine members to Indonesian authorities, triggering their arrests.

Now, Bali Nine ringleaders Andrew Chan, 31, and Myuran Sukumaran, 33, face death by firing squad this month.