No straight conversions yet.
The B1/B2 licenses still don't exist - not until early next year when part 66 comes into force.
Until that happens, they can't even start to consider cross recognition.
CAO100.66 provides a means for holders of CASA AMELs to attain the privileges of the B1/B2 license before Part 66 comes into force by way of a maintenance authority - this is mainly aimed at operators who have new types coming in and want to take advantage of the system, eg: Virgin and the Brazillian Fantasies.
Until then it's a case of go to an RO, get assessed and more than likely do the CTCs .
Aviation Australia in Brisvegas are probably the mob with the most experience with the old/interim/new systems and may be able to advise some more.