I am looking for a part for my model R clutch. I am not sure what it is called but it is the part that goes on the outside of the clutch. The three springs attach to it and the adjusting nuts push on it. It is cast iron. Anyone got one for sale?

I have to say that it was a bad day for the R. I put the parts I had in the clutch and everything was going well. I changed gears, started to engage the clutch and the was a loud bang. The clutch lever slammed back in my hand, the front wheels came off the ground and now I am looking for a whole bunch of parts. More specifically,I need the parts that are related to the clutch operating sleeve. Appears I need three clutch dog toggles, three clutch dogs and three clutch operating bolts. I am told the clutch dogs are obsolete. Anyone have some spare parts kicking around the back 40? Has anyone had luck welding cast iron? I have heard of it being welded with nickel but I don't have many details of this. Thanks for all your help.