You may have to go to a precision machine shop in your area to look at it. I wonder if you could take a cut out in the bearing to remove the damage and go with slightly larger rolling elements. I'd worry about a sleeve on the inside as it may weaken the tube some. Though looking at the pictures, there is a lot of meat there. So a sleeve properly installed could work. But I think that repair is beyond most automotive restoration and machine shops. I think you are into high end industrial repair shops. Hopefully the cost doesn't outweigh the replacement.