The local(ish) Axminster was out of stock until December for mitre saw table clamps so I decided to make my own.
I bought a 12mm machine leveling foot, then used a bit of rectangular stock for the body of the clamp, a bit of 12mm all thread for the rear post, and an 8mm knob to lock off the height.
See video for machining the knob:
https://www.youtube.com/watch?v=5QID...ature=youtu.be