First pic below is a U shape bracket with 6 holes, OEM SW-Motech.
You can easily make it by urself from a nice piece of metal strap, shape it, fold it and drill 6 holes of different diameter: 2 bottom for the U shape bracket holding bolts, 2+2 wing side L+R to accommodate the turn signals. If you chose this design, you'll have to make one side turn signal's harness longer by about 1 foot, and I believe is the R-side, as the turn signals harness runs on the L side of rear fender, then you have to drill a hole below the stop light - in lamp's black housing to run the turn signal wires through it.
Here are some orientation pics:
This is what I did with my OEM SW Motech.
You may go alternate way and see if lic plate bracket + home made extension can accommodate relocated turn signals + both T-signals harness extension by 1-2 feet