Triumph America 2002 Carb - R/H Controls

Off the top of my head I would look at National Triumph (an ebay shop run by a bloke called Ivan in Wolverhampton - highly regarded on another forum), Triumph-ant and possibly Sprint Manufacturing who have new and, I do believe, used parts. There are, no doubt, others who have used Triumph parts, but I can't bring 'em to mind. Google and ebay may throw up some more.
Good luck.