I finally found it!! It took some searching, but I finally found the website for this "hidden gun case mirror". The company is called Tactical Walls, and they have a lot of different options for stuff like this. This particular set up is only $375!!
Great solution for small spaces and to take the place of a console. Will use CeCe Caldwell's Chalk + Clay Paints or Stain & Finish from Wood & pipe shelf for electronics under a wall mounted television. More