Mbs 2401W slideout roller support

[Loefflerh]

The rollers underneath the slideout left some marks on the underside of the slideout. I am thinking about supporting the areas the rollers make contact. I saw the solution - but no idea where to get it.
Saw a Jayco Melbourne Prestige, identical floorplan with the big slideout. It has about 10 inch wide black plastic stripes screwed on the underside where the rollers ride on the bottom of the slideout.
Any idea of the material and where to get it?
Hans

[Jacquemo]

I saw a similar approach to solving the marking and denting that esults a while back. The fix was a 6 inch wide sheet metal strip screwed in place at all of the rollers. These rollers have also been reported to fails so lubricate them.