Rear window stickers for all you ArduPilot fans out there are now available on SWAG shop.
Size is 60cm x 14cm. UV Resistant PVC Die Cut stickers with transparent placement film on top to help you to place it correctly to your car (or what ever) window.
More will come, post your ideas here on SWAG area.
Direct link to rear window stickers:
https://shop.ardupilot.org/c_stickers/car-rear-window-stickers