Aaron, If you need 944 part's... German Auto Dismantlers is a good source as Lanner said. They have large numbers of 944 cars. They also have a warehouse that has "the mother load" of calipers, spindles, trailing arms, struts, and axles. I have dug through most of it (always run out of time). Their not always the cheapest, but will have what you need.
Oh yeah. They also have all P-rims you can handle, but I would try ebay for rims first.
Here's the site:
www.germanautodismantlers.com
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1970 T1 W/MassIVe 2913cc RAT/?EFI? w/direct fire (very soon) and 915 trans
1962 SC 1776cc SP 944NA brakes, 993 wheels
VKG