One of the Bali nine members sentenced to life imprisonment over the foiled attempt to smuggle heroin into Australia says he is "speechless" about the imminent deaths of co-conspirators Andrew Chan and Myuran Sukumaran.

"Speechless. Really, really, really sad," Tan Duc Thanh Nguyen told Fairfax Media from Malang prison in East Java, where he is incarcerated with fellow Bali nine drug mule Martin Stephens.

Chan and Sukumaran are expected to be killed within days after the Indonesian government summoned the Australian embassy for a meeting on the penal island of Nusakambangan, where the executions by firing squad will take place.

The execution date is likely to be announced on Saturday night, with the prisoners to be given at least 72 hours' notice of their deaths, a time when they are allowed to see family regularly and take religious counsel.

The families of the condemned Australians have not abandoned hope there will be a stay of execution as they scramble to get to Central Java to see the pair.

"I can't believe this is it. We still haven't given up hope," said Chinthu Sukumaran, Myuran's brother.

Mr Sukumaran, his sister Brintha and father Sam are among a large contingent of family and friends likely to depart on Saturday for Jakarta, and then Cilacap, the port town near Nusakambangan.

Andrew Chan's brother, Michael, is also planning to leave with family and supporters on Saturday.

Both of Chan's parents, Ken and Helen, have suffered from poor health but Mrs Chan is determined to travel if arrangements can be put in place.

"I just want to go over and see how he is," said Michael.

It was announced on Thursday night that prosecutors and diplomats had been summoned to a meeting on Saturday to discuss arrangements for the executions.

In another ominous sign the end is near, the final prisoner facing the firing squad - Filipina maid Mary Jane Fiesta Veloso - was on Friday morning transferred to Nusakambangan, known as death island.

Lawyers for Veloso are planning to lodge a request for a second judicial review of her case on the grounds she was "primarily a human trafficking victim in the first place, and therefore, must be protected".

Nguyen was arrested at Melasti Bungalows in Bali with Sukumaran, Matthew Norman and Si Yi Chen with 334 grams of heroin on April 17, 2005.

He was in Bali's Kerobokan jail with Chan and Sukumaran until last year, when he was transferred to Malang prison.

Nguyen has launched an online appeal to help pay for his fifth legal challenge.

The My Cause campaign has already received 32 donations since March and raised $2200 of his $20,000 target.

"By the time you read this there may only be seven of us left," Nguyen says in his online appeal.

"Today as [I] sit in my jail cell and watch the way the Indonesian government is handling the execution of my fellow Australians I am terrified.

"Terrified for their situation, distraught for their loved ones and agonisingly certain I will be next.

"Am I guilty? Yes. Am I sorry? More than anyone will ever know."

The Indonesian Attorney-General's Office has said it is only waiting for the conclusion of one judicial review before executing the 10 drug felons.

Spokesman Tony Spontana told The Jakarta Post he was hoping the Supreme Court would rule on the case of Indonesian marijuana trafficker Zainal Abidin by Friday.

He said all preparations had been made for the executions and it was only a matter of time.

One of Chan and Sukumaran's Indonesian lawyers said the prisoners could be executed as soon as Tuesday or Wednesday if the execution date is set on Saturday.

"We still have a Constitutional Court case, they should not have done this," he said.

However, any ruling made on the country's clemency laws by the Constitutional Court would not be retrospective and the Attorney-General has made it clear the case would not prevent the executions from proceeding.

- with Karuni Rompies