I've borrowed that (and the bar that goes with it) from the dealer a couple of times. I had planned to take that schematic to a machinist along with a couple of cartons but haven't got around to it yet.
My alternative was to source a bolt that matched pitch and diameter and taper the end to fit...but haven't got around to that either...i have an 11 month old so spare time is a long forgotten luxury...
A 3rd option is order one from Triumph if you are feeling wealthy!
We will take this opportunity to summon
@Mittzy and
@Ishrub who might know of one on the east coast somewhere...both are resourceful fellas