If Mill Supply doesn't have what you need, if you have a ford 460 engine & drive train, then you probably have a Ford rear end and they should be able to supply you with parts. My neighbor has an HMC on the OshKosh chassis with the Ford set up.
anyway, good luck, Jim
Jim & SherrySeward
2000 Residency 3790 v10 w/tags 5 Star tune & Banks system Suzuki XL7 toad