I made myself some aluminium clamps - I decided to mill them but cutting from stock might have been easier… didn’t think of that.
I didn’t take any pictures as it’s pretty boring, but they work really really well.
the difference with these is that you can move them about 7cm either way which makes them very adjustable on my Ali bed. So far I haven’t had any issues - I even ran into them with the mill and boy can they take a beating!