The closest match I've found for the alt brushes is Mitsubishi. The
problem with the last one I got was the edges were rounded off and
they spun in the holder. Here's a brush you can buy at the hardware
store and if you can solder you can fix your brushes fairly cheap.
See the Photo Album for part description, maybe print it out to show
them. It fits a Milwaukee Power Tool. It's slightly shorter than
stock but works.
Miles