some have used the Kuryakyn tribal covers (2). others have paid the $500 to have the holes filled and fender repainted. I took another approach, I moved the license plate, kept the light and placed a medallion where the plate used to be (see my photo album)
I used the Kuryakn covers but not sure i'm happy with the look yet. It leaves a gap and doesn't completely cover the holes. The original mount also left marks in the paint that i wasn't able to buff out.
I think unless I find some other cover it will get repainted over the winter
I like the medallion idea if the original mount didnt sit so high