I emailled KO Performance (twice !!) and received no response and on closer inspection found the site hadn't been updated since 2006. Whilst it shows superchargers, you can't actually add them to your "shopping basket" and when I phoned them I got a "receptionist" who turned out to be an answering service, who could not (or would not) confirm they were actually still in business and declined to take a message as she asserted they would not return international calls.
*sigh* Is there anybody on this here forum that can check out these guys from your side and let me know if they are legitimate, in business, trading and ACTUALLY supplying superchargers?
They are KO Performance, www.koperformance.com
Adelaide, South Australia