go here to get a PET:
http://www.porsche.com/usa/accessoriesandservices/porscheservice/originalparts/originalpartscatalogue/
it has all the parts, part numbers, etc. use sunset imports or suncoast for all OEM parts. i recommend you just buy used doors from a junk shop instead of fixing the old ones. if you type part numbers into google, you will sometimes get aftermarket body parts (fenders, quarters, etc) for cheap.
i don't think it's as bad as it looks. BTW, if you go aftermarket, get polyurethane parts. fiberglass sucks.