You will find that 10 year limit at quite a few stealership type service departments. They don't want to be liable for replacing anything they break because finding the parts is a pain at times. I would start looking at independent shops that do bikes other than HD. If they can read a manual they should be able to do the work. The biggest hold up with the shims for the valves would probably be the tool to align the cams if they do by the manual. There is a way to do it without taking the cams off.
bob