Do some homework first -- why do you want a fitter? What kind of riding are you doing and want to do? What issues are you having with fit? Use that to come up with some criteria to work with...
A lot of folks will find a fitter by listing their current city in a forum like this and asking for recommendations. You could also see if there's a local club and ask folks in that group. Visit the LBSs near you and see if there's one with a philosophy/vibe/attitude that matches yours, and use their fitter, or ask them who they would use.
And search for fitter/fitting threads here, lots of good information has been shared!
Sit bones = ~135 mm, saddles that work ~ 155cm/6.1 in wide
2003 da Vinci (custom road/all-rounder)/Terry Butterfly Ti
1994 Gary Fisher Nirvana (vintage MTB/commuter)/Terry Butterfly Chromoly
1991 Terry Symmetry (NOS frame/fork, project in progress)
1973 Raleigh Super Course (project in progress)