Chris I found that exhaust on Yahoo japan. Believe me, if it wasnt such a pain in the ass to get shipped here, it would be in the mail and on my z before I posted it up on here.
Heres the link:
http://page16.auctions.yahoo.co.jp/jp/auction/u32653573
I know a few people willing to ship it to you, but it will cost you, plus whatever shipping is. Its a super sweet part, but at the price you would pay for it you can get a nice custom 3" built.
Rinkya may be able to get it to you, but they tack on some serious fees also. Esp for larger parts like this.
Good luck.