Non-Skid Feet?

   Searched for this quite a bit. I’m looking for a solid solution to add non-skid for the bottom of my 1535 air case. I realize I can just stick on some foam but I’m curious if anyone has smarter solutions, IE rubber grommets with fasteners, which weirdly don’t seem to exist and aren’t offered by Pelican. Just trying to keep it from sliding around the deck of a center console fishing boat.