If you want to buy the clutch yourself. Go to Ebay USA. Prices over there make local retailers look like total rip offs.
I got the top spec Exedy Sports Organic HD clutch for $670 landed around a year ago when the AUD$ wasnt even as strong as it is now. Better than the locally sold Exedy "Sports Tuff" gear.
Part number for 6 speed is :15803 or 15803HD if you want a little extra clamp.
EXEDY RACING STAGE 1 CLUTCH KIT 04-10 SUBARU WRX STI | eBay