You can buy the blank from Suncoast (
Keys & Ignition: Porsche Parts & Porsche Accessories - Wholesale Porsche Parts & Tequipment - Cayman Panamera Cayenn) but will have to have it cut and fob programed at your Porsche dealer. Seems like $130-140 is the going rate for that. If you get the whole shebang from the dealer, plan on dropping $350 or so. Ask me how I know...