I hope this Helps skiller, what are your plans for this machine, are you hoping to take it back to the original spec, or keep it as is?
If you would like help ID'ing the necessary parts for restoration to factory spec, I'll get a list together for you, if you happen to have a photo of the top of the handle bars, and the underside of the mower, that would be great help, if this is the way you want to go.