I looked through the links and also did a search for stereos, radios, and speakers and couldn’t find what I was looking for. I recall that someone mentioned an Audiovox radio that fit and that you can occasionally find them on eBay. Someone else mentioned a Dual 1222 radio fits but looking at them on eBay, they look larger than the standard 2”x6” opening. Plus there are two different XD1222s, one with the knob on the middle and one with it on the left side of the faceplate.