...an odd 10 on 8.75 bolt circle with hub mounts that it is difficult to find tubeless wheels for.
Difficult to find used; somewhat but not impossible.
Difficult to find new; not at all... Accuride part number 28160 Page 12 on this link
http://www.accuridewheels.com/completeversion.pdfIf you want some nice newer axles, look even newer. I swapped the axles from under a Chevy topkick and a small Freightliner to an F350, both axles had very nice disc brakes, and a very common 8 lug hub piloted pattern with your choice of 22.5 or 19.5" wheels. I've seen similar axles on fed-ex, ups, and similar delivery trucks. And there are some similar axles with the regular semi truck hub piloted 10 lug wheels with and hydraulic disc brakes too.
Also lots of school busses have these disc brake axles.
If you're going to swap something, make it a worth-wile swap.
Grigg