I had a similar experience. I started rebuilding mine on the 57 1/2 ton. I couldnt find replacement arms for the upper hinge keepers. I was able to do the pin repair though. I wound up buying repops and had to enlarge the slotted holes and rework the angled portion were it fit in the door pockets. I’d use original hinges if I could fix the keeper mechanism since they fit in the doors much better.
Larry