Thanks MetalHead,
Great
http://www.comfortcustombedding.com/
Quick Google search found these guys. Looks like they can do any type or style.
But if you can get one of the memory foam pads and cut it your self .....?????
My v berth has a 4 inch hard foam pad line the rest of the seats and it is not very comfortable, but easy to clean. I would worry the cloth/spring ones would mold real easy.