Ours was a laminate so I took the "sink insert" off the bottom and screwed it onto a real cutting board and use that as the sink cover. I made a fold down shelf, next to the stove, with the old cover.
Excellent suggestion, Pat. We just put ours on a shelf in the garage, so it can gather dust. (It's very good at it.)
I've posted this before, but couldn't find it just now. To cover our sink, we use a wire cake rack. (A small cutting board works nicely on top of it, and you can still run a little water for rinsing things while you're doing the food prep.)