has anyone made a clutch for adjusting rod?

If you have a welder, or someone who can weld for you, a quick and easy solution is to go over to your hardware and pick up a stainless steel eye bolt of the dia and length you want and one of those extra thick grade 8 washers (or your original fork rod end) of a size that has a hole just slightly over that of the z bar pin, cut the eye off and weld the washer on. If your hardware is well stocked, you may find a grade 8 bolt of the right length and dia, and use that instead of the eye bolt, but mayve harder to find. Good luck.