If your bearings have spun, you have to do something. On modern equipment I would simply replace the housing because I have dozens of them laying around. On old stuff that is obsolete, its a different story. You may find a used one, but its not that easy. Or you can remove the housing, weld up the journal and turn it if you can find someone with a lathe big enough to swing it. Or you can hire these guys.
http://www.axlesurgeons.com/ However, they are not cheap. Back in the 50's and 60's we used to dimple the wheel ends and run them another 100,000 miles with no problem. I doubt that your truck will ever see that kind of miles any more.
