CHARLES S - re Bent or wobbling rear wheel. All you really need is the axle shaft. Or maybe even just the wheel itself, but if you say the axle is bent we'll believe you.
Swapping axle shafts in simple, jack up & block rear of tractor off ground, remove rear cover from rearend, spide the axle as far in as possible, remove the retaining ring, kinda looks like a large heavy snapring or Circlip, axle slides out. Insert new axle, reinstall retainer, reinstall rearend cover, refill with Hy-Tran.
And the wide frame parts should fit your 127, as long as you have the same style brakes on both tractors, meaning internal brakes on both or external disc brakes on both.