I'm parting a 95 GSX and have the rear disc conversion pieces for sale. I converted a few local RS's and you'll notice a bit better breaking, but you'll enjoy not looking at the ugly drums even more.
What is included: both rear rotors, calipers, pads (75% remaining), brackets, dust shields, hubs, rubber e-brake lines, parking brake cables, parking brake cable mounts (in cab), clips and 12mm bolts. This is a true bolt-on affair.
$200 shipped (everything weighs in at a bit over 70lbs) Local pickup near 35501. Paypal verified.