I think you will be looking for the B-125 stationary version bell housing. These should be easier to find than asking for one for a 60H but are the same part. The starter mounts at 12 oclock. The B-125 often sold for military use and there were a lot of them around. In my area, navy pull-offs were common. Only problem is that through surplus processes, they may not have made it to tractor scrapyards as often. Talking to used parts dealers about this might be the ticket.
The remainder of the parts are mostly off the shelf rebuilts.