I’ve got this one. Works well and adjusts easily. Small enough to throw it in the bike bag as well.
ETENWOLF Zephyr S3 Heavy Duty Tire Inflator Air Compressor
The clamps I noted above do fit. They tighten in a different way than the ones supplied. I suspect they are for the last Gen.
The pics show both sides of the clamps
These are what I used. Search Amazon with this description and they should be first in the result.
GCi STRONGER BY DESIGN G-16 Pinch Clamps for Inside Mount Tonneau Covers (6 Pack).
I have the Bison Flip Back Hard Tri-fold Tonneau Cover. It’s good for the price. It does hang over a bit near the cab, but that is not an issue. The clamps they provided did not work so I found some on Amazon. I did a Google review of it.
I have one. A couple of small issues. I had to get different clamps as the supplied ones would not stay in place. Also the ends of the rails were poorly finished - fixed with a file. It has the option of folding up against the back glass if you have something large in the bed.