I'm not sure if I follow you correctly. You are looking for something to cover the bulkhead, not the floor. If you are looking to cover the bulkhead there is a product made of fiberglass that comes in 4 X 8 sheets and is about a 1/4 inch thick that is used mostly as a sanitary, washable wall surface in commercial kitchens. We use it all the time in those situations. It's not real expensive and is easy to cut. You might want to look into that. Any good lumber yard will have it, or be able to get it in days.
Good luck, hope this is what you are looking for.