Tom Brown has asked about getting his music box repaired in the
Northeast.  I would suggest contacting the MBSI and asking for a list
of restorers in your area.  You can then contact them individually and
ask about their backlog and recommendations on your particular box.

You didn't mention any details about the box, however; do you know the
maker?  What is the cylinder length?  Is it a straight music box or
does it have other items (bells, drums, organ, etc)?  And most
importantly, what's wrong with it?  Has this box simply stopped or has
it suffered a "run"?

A "run" [runaway] in a music box is the unhappy event that happens
when the governor suddenly loses the ability to control the power of the
spring and the cylinder spins uncontrollably very fast.  The result is
usually the same: the cylinder needs repinning, teeth and/or tooth tips
need to be replaced on the comb and the governor needs to be repaired.

In regards to the wait: you may be forced to rely on your ability to
outlive the repair wait.  I've heard from several repairmen that they
have at least a three year backlog before they can get to any given
project.  Music box repairers are often very busy -- that's one of the
signs of a good repairman.  These repairs take a lot of time and very
quickly you can build a backlog going back for years.  I recently
waited nine months to have a cylinder repinned.  You can not rush any
step in the process.

There are music box restorers in the New York area but you're looking
at a long wait time.  If you find someone that you interview and you
trust them outside your area, any courier can deliver your box to them
and back quickly enough that you'd never notice the difference.  And,
the cost of shipping a music box is also negligible in regards to the
cost of restoring it, so you may want to consider that option; it may
help you find a restorer that can work on your box quicker.

Eliyahu Shahar