Why not this?
http://cgi.ebay.com/ebaymotors/Porsche-Boxster-S-03-04-3M-Clear-Bra-STD_W0QQcmdZViewItemQQcategoryZ50457QQitemZ8063985 870QQrdZ1QQsspagenameZWD1V
I just searched Boxster 3m. It's basically clear vynal that covers the whole front end of the car like a big sticker. You can not tell it's there even but really protects against stone chips and stuff...