I found these nice 3-D emblems the other day on e-bay. I'm not sure where you would put them but they are of very nice quality for the price. This is a link for the 986 Porsche one I like. But if you check out the seller's store, you will see he has other Boxster options. Including a 3-D Porsche logo. Enjoy!
http://cgi.ebay.com/ebaymotors/2X-986-PORSCHE-3d-Decal-Sticker-for-Boxster_W0QQcmdZViewItemQQcategoryZ50447QQihZ008QQ itemZ180132434009QQtcZphoto