Who in town carries the rubber non slip mat to put on stairs?

You can try home depot, Coastal store or Diamond Hardware.

They all do, but what works best is grip strips. They have adhesive on one side and a mild grit grip on the other. Similar to what you put in a bathtub, but meant for stairs. Mats tend to slip too and are not as reliable. Hope this helps.

Possibly even harbor freight might have something like that, on 6th street. Walmart might also.