I talked to Will Tillery and If got me a good price. So give that a go.
Mine was doing the same thing. I just pried the squirrel cage(?) off the spindle carefully, and then cleaned the brushes. I slid a flathead screwdriver between the squirrel cage and blower motor housing to use it as a pry bar. Just make sure to not damage the squirrel cage, otherwise you'll have to buy a whole new assembly. Reassembled and no more squeak. Plug the motor back in to check it before you completely reinstall just to make sure you cleaned it well enough.
Do you have any pictures.