Hi Paul,
I'm the guy from WA that posts here occasionally.
The only manufacturer I'm aware of in Australia was/is RC Speedsters who produced a fairly expensive modernised update with Subaru mechanicals. Not sure if they're still around though.
I have a very well made, Belgium replica, an Apal Speedster, which is currently undergoing conversion to RHD in Perth WA.
When it's finished, I may consider selling as I may have the opportunity to repurchase my old 1961 356 B coupe that I sold interstate a couple of years ago. I should know by early Feb 2012.
If I do sell the car will be advertised in the low $30ks.
Regards,
Phillip B