Garand Parts?

As long time readers know, I have an C.A.I Garand I had purchased 11 years ago before. I purchased it back before I really knew anything about Garands.  If I know then what I know now, I would have purchased a different one.  That being said, I believe it is cheaper to fix this one rather than purchase a new one.  My Garand has "Short stroke" issues, relating to either the Gas port or the Operating rod and spring..  Where can I go to get replacement parts for it?  I have checked CMP and they are no help.   Where can I go and not get mauled.    Any ideas would be appreciated.