www.autoaccessorystore.com (sponsor a-l.com....good ppls...gotta get to know them)
Twin "02" (popular): exhaust + shipping = $363.90 (Group buy: different story)
Twin "02" catback : exhaust + shipping = $524.84 (Group buy: different story)
I know kinda pricey...you can try e-bay or see the sale section of this website to see if a member has it for sale....
hope that helps