haas does not sell brushes anymore they sell motors. you may find an hfo that still has some brushes that they are willing to sell. the other option is see who the manufacturer is ie bison or bodine get the numbers off the motor and find brushes from minarik or some other distributor if your hfo does not have them. most likely you just need to pull them out and clean the races and the brushes i cannot imagine that they wore out in that amount of time. sometimes i file the sides down so they ride smoother in the race.
REYTECH Machine Service Corp. CNC repair NY, NJ
http://www.reytechmachine.com