I've got a HO that saw a office that had finish doors on a slide on the exterior of the wall. Almost a pole barn door. He wants me to build him a door and closet for a gun safe that the wife won't allow him to have in the "open". LOL. He's a good guy (I know him) but it's got to be in a hallway and this safe is 37" wide. I've never seen one or the hardware to fix the track on the outside of a wall. Been trying to search but no luck. Bass, Gus anybody have a link to find this door system?