Jet clamps

Are you talking about the alluminum ones with the spring loaded stops the catch on bumps in the tracks? If so Jergenson makes some, and they’re available at HF, but I don’t recomend the later option, quality has been an issue in about 75% of the ones I’ve seen from there.

-- The mark of a good carpenter is not how few mistakes he makes, but rather how well he fixes them.

Not sure about the spring loaded thing. they are bar clamps, with notches that catch the movable side, throat of 4.5 inches. the handle is not stationary but a toggle. these are heavy clamps not made of aluminum/