i was in a similar situation to your self, so i ended up buying a good shell as that was the basis for my project, two years down the line and many decisions later i now have a helos blu lowered on porsche d90's with a new black mohair roof , new suspension, exhaust engine and interior i found most of the stuff on ebay and on the mk1forum, dont be afraid to dive in to the unknown as long as the basis of the car are sound its all good fun and a good learning curve