Here are some ebay auctions for the GSXR TB's that work pretty well for this. note these are 2000+ and have the two butterflieshttp://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2405551567&category=10066http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2405947610&category=34284