I'd like to know more. I definitely am thinking along these lines as of late. I know a guy up here in Canada that builds his own fiberglass over steel tube bodies that go on a chopped Suburban frame. I couldn't believe the quality coming out of a small amateur shop!
The idea of fiberglass up here is great for rust proofing and being lightweight means more power, better mileage, and less concern for gearing. But $10 000 CAN plus all the extras that need to go into it is a little steep. $6000 US closes in on the same price too though. Plus shipping and duties. Stainless is interesting!
If this turns into a serious venture or you have more info please PM me. Thanks, Jason.