ummmm soo do you want to change the entire set up?
or just add a heel toe to your current setup?
I would post a WANTED add in the classifieds section, several people hate the Heel toe and might help you out.
BUT, Ive never seen the left side of a roadster, dont you have Mid mounted controls? a triumph dealer might sell you just the shifter, no idea if it woudl work for you though.
there is probably some one that would swap you floor boards with shifter for your mid mounts