Personally I'd scrap the idea, you're only going to spend more time and effort trying to get them to fit.
Find another wheel, it would be daft to downgrade brakes over a wheel.
Plenty of options out there
Its a big shame though and feel for you, all that excitement blown up into disappointment. Did you check they were going to fit before purchasing?
I've been battling a wobble on my rims for the past 4 months if not longer. Sick to death of it.