Our Suncruiser had a fitted wooden cutting board for the double basin sink, as well as a counter top material one.
This Sunstar has the double basin sink with one larger and one smaller basin. I searched and didn't find anything I liked, so I was going to make something suitable.
Then I searched on plastic cutting board, and found this page:
I just measured the sinks and ordered one for each side. They should be here a week from Wednesday.