D,

You can order 1/2" thick poly cutting board in 4x8 sheets if you have a butcher supply store close by. I don't have a fish cleaning station but i do have a couple of 36"x48" cutting boards i use when processing sausage and salami. A guy with your kinda talents at construction could cut the poly to make a counter top for your fish cleaning cart. I ordered my cutting boards from Southern Indiana Butcher supply online.

Mike