It's interesting you mention this. Wingaway Air Pty Ltd and Heron Airlines Travel Pty Ltd are both being shown as 'under external administration' on the ASIC website (maybe that happens during a sale?)
Skymaster Air Services (which was also part of the Airtex/Avtex group) has been deregistered.
It was also my understanding that the AOC of Avtex (who was/is the AOC holder for AIRTEX) was suspended after the Canley Vale crash? So who's doing or going to do the flying?
I wish the new owners all the best. It used to be a good business and a reasonable place to work many years ago.