Installing the cable box behind the TVs in a commercial environment(lobby/fitness of a residential building). Is there a in wall/recessed swivel mount that can be locked? Doesn't need to swivel; just needs to come out enough for access to the cable box in the media enclosure. The enclosure will lock anyway; just curious if such a thing exists. Kind of like this but in wall:

[Link: peerless-av.com]

I can probably add something to lock it but it would be nice to get it premade.