Need tread replacement on both running boards 2007 Airstream Interstate

[mything2]

The tread is shot (cracked especially on passenger entry side (Sidewalk side). Can anyone provide a source for this rubber tread? Thanks:bow:

 

[avanti]

You can often find it in Home Depot, sold as "stair tread". Look where they have the other stair stuff.

 

[mkguitar]

Amazon has many options, configurations for stair tread too
Mike