The company is: Eurton Electric. Located in So. California, Whittier. (And right by my high school class of '72 locale to boot! lol)
Web site: http://eurtonelectric.com/
Their number: (562)946-4477
Ask for 'Charlie' and tell him 'Dave' sent you.
I just got off the phone with him and he's enthusiastic to fill our needs here. All he needs is to send him a sample brush and he'll match it up or get it for us if it's not in stock. 'High end' expensive brushes typically run about $25 per set. If it's not 'exotic' and off the shelf expect it to run about $15 to $20 for the set.
Anyway, since I plan to attempt rewinding and as I told Charlie it seems replacing brushes can be a big showstopper when we tinker with these things, and as that fact was always in the back of my mind even if I successfully rewound the thing. Who wants to tear into a motor and then go, "Oh crap, the freaken brushes are shot. Not what the heck do I do?"
Per their website they also do rewinds on small DC motors. Something which I found out today is rare as the vast majority of motor rebuild houses only work on much bigger industrial type stuff.
I'm hoping this place works out. Let us know what you find out too.
(Latin translation: Don't let the bastards grind you down)