Repair 8 3/4 sure grip

I have an 8 3/4 cone type sure grip that has damage to the pinion shaft and the hole in the case where the pin goes in. The pin sheared and the damage resulted. I know I can buy a new pinion shaft and pin. The question I have is can I have the hole in the case welded over and then redrilled. This is not major damage, the hole is slightly wallowed. Can get pics if it would help. Anyone attempted or done such a repair. The cones, gears etc are all in great shape so I would prefer to repair rather than the expense of a new unit. Possibly someone has an empty cone style case in good shape they want to sell? Thanks!