Back when I was still a licensed salvage dealer I sold several complete single axles to guys who cut the modern axle stubs out and had the axle stub from their old vehicles welded in. It takes a pretty large lathe to swing a banjo housing, but its not that difficult an operation. Popular ratios that Eaton makes are 4.56, 5.14, 583, 6.33 and and 6.17.
