Buy a Stagea.
Parts availability in Australia would be scarce, but you can get heaps off trademe.co.nz.
Also if anything goes wrong, it's not exactly a well known car, or engine in Australia.
Also, the engine is a piece of shit to work on, to change spark plugs on the back 3 cylinders, you need to remove the intake manifold, etc... Maybe the only car worse than a Z32 to work on