Hello colin and teresa; Try Steve Webb (in the UK) for your parts problem. I had a valve adjuster break on one of my old open rocker Enya 40's. Steve had the replacement part for me. The lady I talked to was very knowledgeable, and I got the part in a week. I don't remember what the cost was, but I do remember that it was very reasonable.

I tried hollowing out an allen screw head, and it worked, but I'm glad I have the right part in there now.