I have a Beeman R10 in 20 calibre that I haven't shot in 20+ years. I'd like to find someone in the Vancouver/Portland area who can disassemble it, inspect, replace seals, and repair as necessary etc. so I can get it running again. It used to run like a champ but I'm sure that all those years in the safe have not done the seals any good. I would appreciate your recommendations.