Thanks Reggie and Pommiejohn.
I was at Russell Motors yesterday afternoon, but unfortunately they had nothing on my shopping list (front mudguard, head gasket, rear sets, etc.). They said they have more stock for older Norton singles than they do for Commandos. Hmm....
I suppose I could have started a lengthy discussion on the logic of such a specialization, but who am I to tell them anything.
It's too late in the afternoon to make it down to Carl Rosner's before closing time.
Ah well, I can always shop the old fashioned way when I get back to the US - via the web. Just thought it would be fun to poke around a genuine Brit motorcycle shop and discover some treasures for my Mark 3 - especially with the dollar relatively high against the pound.
Thanks again. Keith