Just a heads up but dps-motorsports is getting together a group buy for GT3 and GT2 front bumpers in Polyurethane (ask for the rennlist price). The rumored price for the FACTORY front bumper is $950 which is not much more than those much more fragile fiberglass aftermarket bumpers are going for.
They are also about to unveil a GT2 style bumper that will work with the Boxster or narrow 996's also in polyurethane, not sure if that's factory though.
They may have good pricing on side skirts as well.
drop them an email if interested.
http://www.dps-motorsports.com/Body%20Kits.htm