I count myself very lucky with my LBS. they don't push the fact they are retro friendly, far from it, they look like any other as far as the showeooms concerned, but if you catch the bossman on a good day and mention that you are doing up an old MTB you'll get offered a coffee while he or his minions root around upstairs for any suitable parts!
To be fair my idea of retro and his may differ, (m750 rear mech isn't retro to me) but they are more than happy to work on old bikes and seem prefectly competent setting up cup and cone bearings, cantis etc.
As far as a bad day is concerned, Ive no idea. But at least one of their members of staff is registered on here, they were selling NOS STi units on here a while back. Further proof they have the right stuff hidden away