I'm running a wagoneer axle. Dana 44. Width matches perfect with my montero sport axle, and i'm sure it'd be super close to an SR axle.

Also some toyota axles, though I'm not sure which.

Bottom line is the cheapest option is a D44 from a wagoneer.

They all come with 3 something gears, do you're going to have to get a 4 series case, and 4.56 gears to match your 4.62's, and Manual hubs, cause most of them come with hub slugs.

Those add a few bucks.

I did my sas for under 900 bucks. Lots of fab work on my own, setting my own gears up, scrounging crap out of the dumpster etc. Free take out springs.... Spool... bottom of the barrel stuff ys know. BUT After I got it all in there, and working, I slowly upgraded to a locker, super joints, chromo shafts.. etc. Now I've got a bombproof d44.