[Meir]

the OEM connector is a european standard. so it can be found in almost any eauropean made car.
you can also find an after market solution that will fit.
i.e.: Smart Car Stock Radio Wire Harness Plug 2008 2010 | eBay

good luck.

edit: even cheaper - http://www.ebay.com/itm/PORSCHE-OEM-FACTORY-Radio-INSTALL-WIRE-HARNESS-PSH-V1-/200570061714?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item2eb2e84392