You could buy a Choke body for about $4500 the fit your bits to it, subframes etc
but you may have trouble registering it.
Or you could spend the $4500 on doing up the body you have and you'd end up with a real moke
I'm not sure what a panel beater /spray painter would charge to do a body resto but it may be close to the same.
Can you track down a retired panel beater who does work for a bit of fun, maybe a lot cheaper than a pro.
Do you have the time or inclination to do it yourself, learn some new skills in the process, it's very satisfying
to say 'I did that'. Try and get a copy of Roy Scotts book to see what can be achieved.
Post up some photos of what you have.
Where about are you, it may help with recomendations.