if you are near marikina area - try REY's electrical (it's on the road that traverse between Sumulong Hiway and Imelda Marcos Hiway na ang kanto ay Sta Lucia Mall ang labas. It is about 500m before Sta Lucia Mall on the right side of the road coming from Marikina Town proper.

Try also Speedyfix (one of the forumers dito yung owner), baka kaya nila. Else any nearby electrical shop that do alternator and starter can do that. The brush is usually available on any autosupply store.