I think these are the US offerings. Dana has bought up many axle manufacturing companies around the world, including GKN/Salisbury in the UK, and BTR/Borg Warner in Australia. These all had their own axle designs, which may or may not be still in production. So I would be very wary trying to assign a particular axle from this website to the axles MMC use.
Probably are US. I think shipping costs are the controlling factor. Another rear axle that is used is a Volvo (can't remember the model) and it comes with disk brakes. At the time I was building the +8 Bitsa the rear axle was a challenge. Thus the S10 pickup unit I am using now. Bill Fink's +8+ project made quite a few Salisbury, BTR's +8 rear axles available. That is where I sourced a Salisbury with Quaife LSD. Just do not like the ratio 3.30.
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