yeah, lots of 8.5 axles out there, but it would be a miracle if one had teh same exact length, wheel bearing ID and spacing from flange to bearing. Yukon won't make custom axles ther are mass production only. I hate to have to get a set of custom axles from Moser or Currie. I'm running a 270 GMC with a blower backed by a T5 and the old stocker is not going to be up to task.
I had talked with Yukon earlier about this but getting all the various dimensions wasn't worth their time...