Advance Camera in Portland OR. http://www.advancecamera.com/
I bought an F from 1970 a couple of years ago, the last in my little F collection. I knew that the camera almost certainly would need a service but it was a one family owned and in otherwise very nice condition camera.
The slow shutter speed settings did not work and the meter did not work either. Both were fixed and the camera is now as reliable and as accurate as a new.
Jodi Fisher does her magic on these older Nikon's, give them a try.