Since it's only for a 'mock historical' installation I'd talk with the local AHJ and see if I could convince him that it could be done safely. If they're mounted at 7' above the floor he might be amenable, especially if there is adequate code-compliant wiring to serve the needs of the room. Maybe if he can see that there would be no temptation to ever touch or tap the cleat wiring he'd let you do it.
