If the Exploder is going to the boneyard (towed? trailered?), then I'd just use the old ranger u-bolts to bolt the ranger axle to it (might have to spread them a bit or drill a new hole in the existing plate, dunno). Who cares if it is spring over or spring under at that point? It just needs to be gone. No need to hook up driveshaft, brakes, shocks, or anything else.
For putting the 8.8 under the ranger, I'd borrow a welder and make some spring perches from heavy-walled tubing. Set the ranger axle on jackstands, get the perches level, and then measure the angle of the pinion flange, and the shock brackets while you're at it. Make a drawing of everything! Especially where the perches need to go. You might be able to buy spring perches, dunno, but it wouldn't seem like too difficult of a job to make them.
Now basically just figure out where the spring perches go to match with your truck, get the pinion angle the same as well as the perches being level, and tack-weld the perches on. Re-check everything!!! Weld on the shock mounts in the correct place (these are far less critical than the spring pads). The shock mounts need to be either cut off the old axle with an angle grinder, or buy new ones. The diameter of the tubes is different so you're gonna have to do a little creative work with the grinder if you want to re-use the old ones.
If it all looks good then stitch a few more weld beads, alternate sides and don't get it all too hot. Honestly the spring perches are pretty well captive so there's not too much chance of them going anywhere.
Probably an afternoon's work at most to get it all welded up and ready to go, and then you don't have to pull the (darn) thing again. Don't forget to check the pinion flanges to see if you need to swap them or frankenstein something together for the ranger driveshaft to fit the 8.8 pinion.
If it really would cost you $800 to get a decent axle from the boneyard, then there's ample budget savings to get a welder if you don't already have one.
That's what I'd do.