I was watching an ATOH show over the past year or so and saw Tom or George use a solid piece of some material with slots for electical outlets that caused cold air to be blocked from coming into a room and thus lowering the temperature in the room. I have several leaky ones that I would like some help with "closing the gap." Has anyone seen that product and know where I might get some? Or do any of you have any other ideas for me? I would appreciate all the help I can get and will return the favor.