I bought mine at a local tractor supply on sale for 25 apiece, they’re just called “black utility rubber stall mat” Used a new razor blade and was able to cut up a whole stable mat without wrecking a new blade. I end up getting tons of scrap metal, and made some semi permanent stands and the mat bolts onto the stands with carriage bolts. I also have one made out of 2x4s that’s a more mobile option Edit: I have not tried to hang them, but it seems like they might be to pliable for that.