When I was a kid all the kitchen and bath places had a rack of the holes they cut out for sinks and they were cheap. Rather than filling the landfill people would buy them and use them as cutting boards or make little tables out of them.
I don’t know if anyone still does that.
What you are looking for is called laminate. Formica is one brand. You can buy it not bonded and shops that use it have a lot of small scraps around you can glue it on yourself or take your piece in and they will cover it for you.