Are you able to order screens for those if you know the part numbers? I do not have the part numbers. My boat has screens on all the hatches. But they are velcro, glued on 1/4" strips around the perimeter and then velcro around the edge of the screen. Years ago I used small screws and washers to better secure the velcro. Set it up so only the half at the edge where the dogs are located pulls down.