This is what I’ve been using for Baldor grinders I restore:
10Pcs 21mm x 12mm Black Conical Recessed Rubber Feet Bumpers Pads
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/253378819034
Why not pich up some rubber stoppers and make them work? Ace carries them in a variety of sizes.
Is there any chance Ace, Home Depot or anywhere local would have rubber isolators like these?
Ace a number of pads on their website, several look very similar to your photo. https://www.acehardware.com/departm...rniture/protective-furniture-pads?pageSize=90