It is highly unlikely that any of the above-mentioned entities would ever meet all the CASA compliance requirements to get an AOC here. I will be at room temperature long before any of them run jets on an Aussie AOC. It is unlikely that the Kiwis would entertain them either, so no fear of any monkey business via the TTMRA.
More likely, any operation would be a 'flag of convenience' arrangement.
A FAOC issued via another ICAO contracting state allowing operation to and from Australian ports of entry is easy enough, especially for freight. There are ICAO states, and then there are ICAO states..........
While no fan of these guys, can't say I would blame them for trying to get around CASA any which way.