Buy a standard vinyl cover in the size of your choice and get creative with vinyl paint. Or you can easily do the upholstery work and make it however you want it. It is a heck of a lot easier than swapping out transmissions and engines. Besides, when you are done you will have learned a new trade. Here's one I cobbled together for the Chariot. Didn't cost 80 bucks either...at least if you don't count the time it took.