I have a facility with hundreds of power/data poke-thru devices. There is a concern about neatness of the various conductors and cables that plug in to these units. It has been suggested to "custom" build an apparatus that would cover and conceal these cluttered poke-thrus. My problem is with the custom cover not being listed to be used as such over the listed/UL rated poke-thru. I cannot come up with any ammunition for this, though. Any prior experiences or guidance?