I am doing this very thing, while replacing the right side ball joints. I have known the shaft seal was leaking, but it was a ‘get to it someday’ thing. Now, I had the knuckle off and pulled the cv axle, because, why not —- The inner boot was torn when the jeep came down after the ball joint failed.
Anyway, a groove is worn (ground) into the shaft and the housing is dry as a bone in the axle tube. I had planned on replacing the bearing and seal while the cv shaft is out, but now need to find either a replacement intermediate shaft - or - an offset bearing that would allow the damaged intermediate shaft to be used, but the bearing sits back about 3/4 inch from the damaged area.
We used to do this years back on rear axle applications, but I can not find a mention of the repair bearing for this application.