google is your friend:
http://www.porsche.com/all/media/pdf/originalparts/usa/986_USA_KATALOG.pdf
Now this is not what I call a "good" PDF where you can search and find parts easily. It's a pain in the arse to page through the document until you get to the right area of the car where your broken part is located. But it's there.
Additionally, part numbers do change and get updated and there's a couple of parts you don't want to buy for your model year but from a newer model if it's a direct fit, so be sure to ask whomever you're buying parts from if there's a BETTER Porsche part to use.