II guess this isn't the only thing, but this 15/16" missing piece would be a good find. The empty spot gives me something to search for. The part number is 44102. They are full polish Craftsman Professional set number 9-44135. I don't think my chances are very good, but I know it is out there somewhere. Should probably have bought the SK version when they were still available in a few places. 

Man my list is so long I can't keep track. Every time I see a tool my list just gets longer.

Perhaps one of every tool shown somewhere on tool talk.