If you're in Florida just get Reg Dodd of Backdraft Racing to build you an Australian compliant RHD Backdraft. There based in Boynton Beach. There are a few here registered in Oz in RHD and fully complianced. They use to be sold through Component Cars in WA but no longer
afaik.
Only suggesting them due to your Florida location. Their cars aren't for everyone but if you can locally control your own build there's a big value in that alone.
Cheers and good luck.