You could probably sell a few. I made one for my Edge tail light. Pretty simple to do.

well there you go! that was pretty much what i was going to do. without the light adapters though.Someone is a step ahead of you.
http://www.cyclegear.com/spgm.cfm?L1=2&L2=64&L3=&L4=&item=MRX_NPBK&tier2=14
I found this at cycle gear last year when I got the Edge tail light kit and discovered the bracket was for euro plates. Its 10 bucks for the silver or 20 for the black one. I just tossed the blinker mounts (they are separate pieces) and used the main piece by itself. Works perfectly and you cant go wrong for 10 bucks.