G'day Dabz,
From memory there is a 10 hours on type requirement from the Australian Parachute Federation (APF) plus the operators insurance company may require more hours on type.
If you don't have many hours, I'd try get a few hours on C182, C206 or if you are cashed up a C208 endorsement? The 206 and 208 were also fairly widely used in charter ops up northern Australia last I looked.
Plus there is no parachute rating in OZ- I believe NZ does something along those lines?
Its been 5 years plus since I hung around drop zones so someone else might like to confirm these details.
Chur Bro