You just need to pick a school that will accept your RAA time.
If the school you pick acknowledges that an RA machine is a recognised or registered aeroplane (which it obviously is)
Just to clarify... (this is not a dig at MPrince), that would be
any GA school.
It's not up to them, it's up to our friends at CASA.
If the school attempts to not allow your previous flight time count, put a call into your local CASA field office for clarification.
That being said, it's all about competence. If you have 500 hours in RA-Aus, you might still need to do 10-20 or even more by the time you are competent to their standards.
It's a careful balance.