Here’s a 12-piece assortment of clamps from Amazon for $16.09. The set includes two 2″ C-clamps, two 4″ C-clamps, two 1″ spring clamps, two 2″ spring clamps, two 18″ bar clamps, and two 24″ bar clamps. All clamps have a lifetime warranty, assuming you can find the manufacturer at some future date.
As always, it’s impossible to vouch for the quality of these clamps. But 12 clamps for $16? Might be worth a risk.