Sorry it took so long , finding things after moveing Is a ***** But I found it , it has a tooth that could use some help, it is a little bent and is cracked at the base, also needs the long key that has a pin that locates into the hole , be advised that SB hand drilled a lot of taper pin holes that make it real hard to interchange parts. I do have the dial bushing that was pined to the shaft. Do you have the telescoping screw that slides into the gear shaft you will need that also. I got my new telescoping gear shaft from latheman2 on the pm site , I think I got the last one he had left though. They rarely turn up on ebay and are proud of them when they do. The brazed one in pic is what came on my machine that the PO made , wasent happy with that.
I kinda like having hard to find spare parts around but if it will get you going I'll part with it.
You may try Miller machine shop as he makes some SB parts not cheep though.