Fireplace Folks at 1902 Stoughton Rd. did some really nice work for me a few years ago. I wanted historically compatible masonry and they sent out a guy who knew what he was doing and did a good job. They even found some matching local stone (salvage, which is the way to go on an old building).
Everything depends on whether they still have that mason working for them (or someone equally qualified). If I could remember his name I'd tell you, but I can't. So, since no one else has offered a reference here, I'm saying go talk to the Fireplace people, describe your job to the owner (who is very knowledgeable) and ask if they can do it or send you to someone who can.