Used Triumph PN A9608004 (heat shield not included) for MY 1999/2000 and 2001+
PN A9608004 (includes can A9601014 and pipe to replace catalytic converter under bike on 1999/2000). Internet sources indicate fitting on MY1999/2000 with VIN numbers <124103. My dealer (Team Triumph in Wisconsin) says that this will also fit 955i's (the PN for VIN numbers >124104 is listed as A9608018). I believe the difference is A9608018 for the 955i's does not use the intermediate pipe (no catalytic converter), the pipe is integral to the 955i exhaust header, the cans are the same.
Price $220USD plus shipping (US shipments only). :D