You can also look to Kingsbourne (sp). They should have all the parts you need. So should JB racing or maybe Henry at Supertech as well.
Turn3 Autosport- Full Service and Race Prep
996 Turbo, 997 S 4.0, Cayman S 3.8, Boxster 2.7, Boxster S race car, 996. Cayenne TT