that would be 85cents usd to aud? but still very cheap
you can see how criminal oz gov is in so many ways!
Electricity is also prob more than double in oz vs usa

If you can get an A15 that needs a rebuild you could
also consider an L or Z series with a ka24de head conversion
or even a qr20de if easily available there?
Not sure what you pollution laws or personal needs are
for the retro look as it is a classic car.

A15 would prob suit your crossflow head one day:)