Outdoor matting (PL4 Greenbank.)

Hello has anyone got a matting that can be used outside they no longer need? Or just any matting will do.

I would be attaching it to a mounting block steps to make them more gripping as the wood used for the steps part is a bit slippery when wet.

The steps are 61cm wide so would need to be no less than that measurement, I would also need to be able to cut it to size so ideally the material would not be too thick.

Thanks.

I'm in the PL4 Greenbank area.