Tim,  I have sent my Duo-Art motor (which is the very same model
you have) to Bradford Electric.  D. L. Bullock mentioned this company
a few weeks ago.  Their contact info is:

  Bradford Electric
  314-436-7000
  East St. Louis IL

Ask to speak to Jim Knaup (sounds like nap).  I can not vouch for the
work as of yet, but Jim sounded very knowledgeable and I have complete
trust that they will do a great job.  Mr. Bullock has used them and is
very pleased.

I too thought about using a local shop, but if I'm going to be spending
the money I wanted to have the work done by folks who had experience
with this type of motor.

Sam Harris - Greenville, North Carolina -
http://www.geocities.com/Heartland/Ranch/9374