The Clock Shop! Don is the best. He worked on both our grandfather clock and 2 ****oo clocks. As someone else said, he's really busy, and this is his retirement "job", so it may be a couple of months before he can get to you.
The other guy in town I find to be a pompous jerk. And will only work on what he deems an "antique clock". And a grandfather clock, is his mind, is not an antique. No matter how old.