It's from Custom Auto Sound, here's a link. It was about $375 and worth every penny. I forgot to mention when turned off, the dial looks like a standard AM radio - a good theft deterrent in my book.
I had to order one for a 72 RoadRunner as they didn't specifically list a 72 Coronet. However, the unit fit fine other than the faceplate is square and my dash hole has very slightly rounded corners. I am not putting any holes in the car, so I just mounted the radio by the shaft nuts at the right depth that the faceplate just touches the back of the dash hole but does not come through. The radio is super light and I put a rear support strap on it so I'm not concerned at all about this being an issue. If you rounded off the faceplate or squared off the dash hole you'd have a perfect fit. It wouldn't take much to get it to slide into place.
It sounds good and has a ton of sound adjustments to suit your preferences. So far I'm very pleased with it.
