Muffler shops put those little L brackets on all the time for the rubber hangers. Maybe its a good time to wire it in place and take it there? For probably $50 they can do something custom and save alot of headache in a few minutes.
The factory support bracket did not work with the RJC 4" single shot on my TurboT. Instead, I welded a metal strap to the trans xmember. Then, used a universal rubber exhaust hanger from this strap to a bolt on the downpipe flange.