Those are still put in mobile homes that are being manufactured as we speak. There are a few companies in this area that manufacture these homes, but those devices are no where to be found, I wouldn't use one if they were. The good news is, a little trimming of the Sheetrock will allow for a pop-in box, and new devices, bad news is, you can't use a 20ci pop in as the walls are only about 2-1/2" deep. You must use the 14ci. I hate those things...