Real easy answers!
You HAVE to go to
www.rimfirecentral.com and just scroll down to the High Standard forum--you'll get most of what you need there, A guy called Jaybar can help you out with repairs and tuneups
Then or first maybe, go to John Stimson's site (he is THE guru of HS) at
www.histandardinfo/
He has a forum plus all kinds of info on his survivors list, etc. BTW--John is "SGVictor" at the RFC forum