What do you mean by supercharged pulley? In terms of overdrive pulley, I like NonStopTuning's 180mm piece. Pretty much maxes out the SC12 at 13.5 PSI (your results may vary), and comes with a new idler, resized belt, and water pump pulley.
http://www.nonstoptuning.com/pKitToyMR2GZ.htm