the rubber feed on my cheap weight bench were tearing apart. It is a cheap Chinese brand on Amazon, so I bet it'll fit a lot of other cheap weight benches with the same 50mm OD tubing. I modeled up a replacement.

Printed with TPU95A on a Prusa Mk4 at 0.2mm layer height. I also sliced with some extra settings. I left the top and bottom of the model open so that the walls didn't dig into the floor and allowed for more even distribution of pressure. I also undid that in the region with the stopper to stop the foot from sliding too far on. Finally, I gave some fully skin for better grip, although I didn't end up printing this so, YMMV. You might want to scale up or down for a good fit in your application.