Just a thought here for those looking for axles...

Out here in SoCal, 98 percent of all four wheel drives never see dirt, much less any type of adverse conditions. Even though the Waggys are full-time 4 wheel drive (so I think, someone correct me if i'm wrong), an axle from a truck out here probably would have little to no wear on it compared to one from a region where 4 wheel drive is used all of the time.

Maybe wrecking yards out here might offer better SAS candidates than other places for that reason and using a primo axle to begin with may help cut costs.