Just an "off the wall" idea, may be daft - but could be an instant solution;

"Karmann Crossfire Club"



These badges are free of cost, plentifull in supply, top quality and very smart. Thinking about Pauls creative ideas, the shield is nice. Ive never seen one used on the back of the car as suggested, and they are small enough not to look over the top. If someone has a spare it could be positioned under rear right light lense using blue tac and take a pic to see what it looks like. The Karmann name then sits nicely with the Crossfire name on the boot lid.

Feel free to shoot me down - just another idea!