they look almost exactly like the brushes from a wood router I took apart for a school project. I would look for a similarly sized universal motor, they are commonly used for hand-held or lightweight/portable power tools, like miter saws, reciprocating saws (sawzalls), drills, etc.
http://en.wikipedia.org/wiki/Univers...iversal_motors
larger, stationary power tools, and a few portable ones, use brushless induction motors, which produce more torque at lower speeds, but are heavier, larger, and more expensive.