WANTED: Triumph / Spring Motor dual tracking nut bar

[cmk8895]

Does anyone know where I can get one of these tracker bars (and maybe half nuts, too, but less important)? The few parts vendors that do e-mail don't seem to have them....

There IS one on eBay right now for $75 starting, but that seems awfully extreme.

I actually bought the metal to make one, but cutting a line smack down the center of it to separate the two half nuts is apparently beyond my ability.