I know this doesnt answer your specific question here but on my O7 XL1200C I used an "Old Number 7" medallion where the old license plate frame was removed and have got lots of good comments. I installed a side plate frame.
Well I am looking for something that can go over and not look ugly. If anyone has any ideas I would appreciate it. I dont wannt just patch it becuause I dont want to re-paint the whole rear fender.