In WA as long as its not a statutory write off, it will fall under the umbrella as a repairable write off. So negotiate with insurer and see if you can come to an agreement, and have it repaired privately, under your directive.
But if you come across any vehicle that is a statutory write off, that's it in Australia.
However................. And some have resorted to this. Ship to NZ or South Africa, and its plane sailing, and can be registered once again.
This is mainly applied to vehicles that have suffered a water entry issue. Soon as they know its water, its statutory write off.
No mater how slight the entry. Wouldn't ever touch a salt job, but always worth a look at fresh water jobs