Greetings and welcome to the forum, Globey15
Just co-incidentally, there is a very recent post on this forum discussing the same issues you have.
See
Cobra for tall man
As mentioned above, your choices with what is available here in Australia are limited. Importing a car or kit from USA is challenging.
Have you contacted the NSW Cobra Club for further information? They would be a great local, and relevant, resource for you. To be able to sit in different cars would provide information that is priceless.
Good luck, and keep us informed.
Cheers!
Glen