Looking at ducatisuite, a bracket was not used. Is all this bracket stuff basically a means to give your signals and lic plate an easy home?
I believe there are 2 options for mounting ur license plate after the chop
1 is directly under ur tail light
2 is under need the seat (by the mud guard) hence stealth looking.
Check ur frame to see if you have the mounting tabs for the tail light...if yes i dont think u need the bracket because after the chop, u can just mount the light back in the same position.
As for my bike which is the 2000 M750, the tail light mounted onto the beer tray, so when i loose the beer tray, then i have to make my own bracket to hold the light.
If u need bracket, then take a look at ducatimonstertailchop.com and also check out those integrated tail light too and the stealth bracket