I checked RA first but as you say only front bearing. I might as well replace rear as well. The only reference to two brushes is an FSM pic on how to use an allen key to hold the brushes in place to get the rotor in place, only one brush is listed in parts exploded view.

There are two shaft seals listed in FSM but so far I see nobody that carries them.

92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles