Looking to buy new brushes for my Gem motor

Anybody know where I can find brushes for sale for a AMD motor

Ebay generic brushes

There’s so many of them I don’t know which one is the right one

Another question is the motor supposed to create kind of Blue sparks is that a brush issue

If the brushes are worn down so far that the springs aren’t applying enough hold down force you can see sparks. This will burn up your commutator etc. Best you get the motor serviced.