All you really need to do is replace the pads. Draining the brake fluid is not necessary. Just take the pads off, compress the cylinder with a small C clamp (so you can get the new ones on and over the rotor). Inspect the rotor for anything out of the ordinary and replace the pads.
I bought mine from the dealer, but they are the Suzuki brand and arent that great and way overpriced. Badbob knows where to get good ones. I'm sure he'll post here the location/brand/part #.
BTW im moving this thread