my opinion is its not worth it. my brother has a banshee and i have a blaster. we rebuilt our this winter and as they were apart we tried to see which parts interchange. a arms were not even close. need to cut and weld new mounts. the frame area for the upper was not long enough either. hope this helps
personally I'd keep my eyes out for some used aftermarket arms. I know it's hard to wait as I had to do the same thing, but they tend to go for cheap when all they need is a repaint.