That is not really an original idea if you are talking about a sticker for the spoiler. You can get those from Suncoast Porsche. I got a "Boxster" spoiler sticker from them about a year and a half ago. Perhaps your vinyl version is unique in the material used to make it, but that's it. Check the URL below, spoiler stickers for $18.95 from Suncoast.
http://e-partssales.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=P&Product_Code=POSPST&Category_Code=POSESS
I see you are in Dana Point, I commute each day from Oceanside to Aliso Viejo, so you might see me whizzing by sometime.