@nickaix....
The replacement motor parts arrived today. I already disassembled one of the motors and checked for armature "wiggle" with the existing bushing. Yep....there's quite a bit of wiggle.
I slipped a new bushing onto the armature shaft and tried the wiggle test...no wiggle that I can tell.
My question to you (or anyone else following this endeavor ) is; is the armature bushing just a friction fit or is it pressed into the motor housing? I'm hoping a little light "tapping" will free the current bushing from the motor housing.