Wow Dave, how are you breaking vices? I told you you had to use your powers carefully! (lol, "Super Dave")
I have a lathe and am just learning to use it so would enjoy making one for you. Be a learning thing for me and will gladly take a stab at it. Building a shop so all tools are in a pile. So would be a while. If you subscribe to workshop thread,
it will remind us both to work on making your clamping screw when I am set-up. If ya want. I don't want any thing for it, just to see if I can actually make one. But let me know. Really does sound fun and simple. LOL, I say that now. Not so much when I am throwing stuff at new shop walls.