AAAAHHHH!
Thank you!
My solution to this problem is a 50% miniturized color photocopy of the plate.
Kinko (or similar) laminated! Presto!
Mounted on a 2006 mud flap, 50% invisible too...
Seems to be accepted by the law over here, cuz we enduro guys are so darn serious. (biggest motor sport in swe).
/Peter