Hi Bill,
I would think that it would be prohibitively expensive if not impossible to get a new imported cobra registered for road use in NSW. Basically if it is 30years old you can get it registered and keep it LHD if it is 25years old you can get it complied and registered but it needs to be RHD. The car has to be a genuine 30 years old car not registered as a 1965 whatever. Make sure whoever you are talking to has done some research on the issues, there are many.
No good news here I'm afraid.