If you fancy a touring job, Bristow Australia, based in Perth are actively looking for drivers these days. If you're the right sort and age is on your side, you might find a slot there. 2/2 roster, 4 weeks leave and all work is Australia based.
PM if you want the contacts etc
Otherwise, there is very little helicopter work in Perth itself... you might also try Griffen Helicopters, Helicopters Australia and there a a couple of schools that you'll fond on google. There are Police and EMS outfits in Perth... no nothing about the police but I believe CHC run the EMS 412.
Good luck