If you are willing to drive a little bit... I was a submariner for years in the Groton area. There is still a shop there that is hailed as the 'old school' guys dealing in exactly what you want with an incredible reputation closing 30 yrs. They are L&L Machine Shop. 860-445-8075, 475 Gold Star Highway (Rt 184), Groton, CT.
Rt 184 is Exit 86 off of I95N, just a couple of miles straight off of the freeway. I never did any work with them myself, but my mechanic, another small time guy of over 30yrs (who had a '67 big block Camaro) HIGHLY recommends this guy.
Hope this works for you,