Search rubber feet or rubber washers into google. You'll get a few options.
Quote by zgr0826
My culture is worthless and absolutely inferior to the almighty Leaf.

Quote by JustRooster
I incurred the wrath of the Association of White Knights. Specifically the Parent's Basement branch of service.
I just put together a pedalboard with a board covered in felt and velcro, which is also a good solution. Otherwise, rubber feet would be just fine.
Warmoth Strat w/ Lace Holy Grails
'07 Roadhouse Strat
Washburn WD-21 all Koa Acoustic
Marshall JCM-2000 TSL-122
Bugera V-5
Most of the gigs I work at (including bands such as Lamb of God, New Order, Slash, Mogwai, Flaming Lips) tend to use doubled over gaffa tape.
It's an opinion. It's subjective. And I'm right, anyway.
Any good hardware store (such as Home Depot) will have that stuff for sale. So will a lot of bathtub shops. It is cheap and a good idea.
"Maybe this world is another planet's hell?" - Aldous Huxley