Good luck with that! I spoke to CASA about this topic today and was told there are only a handful of Flight Examiners qualified to conduct ATPL tests. It was suggested Ansett Simulators in Melbourne were the only practical solution and they conduct the tests in an A320 simulator. This requires an A320 type rating despite CASA stating a type rating was not required.
If you look at the stat's there have been very few ATPLs issues since Part 61 became effective.