Well . . . what I did was get a buddy with a lathe to turn down a SS rod and cut it to length, four times. Then drilled a hole into one end, and threaded the other end for the metric wing nut. Took std VW cable and the prepared rod to sail shop, as mentioned, and had them cut the cable and swedge in the drilled out end to my overall length needed. One issue I had was that my car is a JPS with a purpose built frame front end and rear vw pan section; a hybrid arrangement, Assembled by hand by who knows whom? Distance from pedal to clutch arm not any particular length. I forget right now what it actually is, but its not the same as the pre-shortened ones used by the builders mentioned here, off by and inch or more. I also had the threaded rod made a little bit longer, with a little more thread, so a little more adjustment is possible. Had three made.
Ed, your lash up is as ugly as sin, and somehow suits your style to a tee. Glad it works.