Found this site yesterday ... seems really inexpensive (and the exchange to US dollars are even better) and they have slip ons as well! Link: Delkevic - Products - Road Headers - Honda VFR800 FW
there are similar ones available here in the usa (via ebay) from MOTAD eBay Motors: Honda VFR-750 VFR-800 VTEC SS Motad exhaust NEW (item 190278359457 end time Jan-15-09 08:10:57 PST)