http://www.matsmatsmats.com/commerci...mbled-mat.html

The blurb says it's useful for slippery surfaces. Besides pre-assembled mats, you can buy interlocking tiles so you can design your own mat.

I have a (probably) discontinued Rubbermaid mat and I cherish it since when I tried to replace it, there was nothing comparable. I found the one I use at an old fashioned mom & pop hardware store.

Good luck!!