Since you're talking axles, I'll pass along what I think in needed out there.
Some HD axle shafts for Tacos with factory rear lockers. Maybe some other's as well.
The passenger side axle is about a half inch too short to fully engage the side gear so they have a propensity to break the collars off of side gears. I've seen at least two do it, mine being one of them and there must be many more.