I need to install a stainless steel 2 gang blank plate on a 4" box mounted in a concrete block wall. The project manager doesn't like the look of the regular 4" blank plate. I tried to us a mud ring turned to the inside, but the screw flanges inside the 4" box are in the way. I can cut them off with a jigsaw, but wondered if anyone else had a better idea. Maybe one of those data plates????