They are real common. Here are just a few off eBay. There are probably 50 of them on there on any day. They were used from around 72-82 in a multitude of cars. Everyone hopes they are a Mustang part to get more dough for them, but they were far more common in the late 70s. http://cgi.ebay.com/ebaymotors/ford-mustang-cougar-torino-am-fm-am-fm-radio-69-70-71-6_W0QQitemZ160062122854QQihZ006QQcategoryZ80741QQrdZ1QQcmdZViewItem http://cgi.ebay.com/ebaymotors/69-70-71-Ford-Mustang-Mach-1-Cougar-AM-FM-Radio-Stereo_W0QQitemZ130058028666QQihZ003QQcategoryZ80741QQrdZ1QQcmdZViewItem http://cgi.ebay.com/ebaymotors/1970s-Ford-Philco-AM-FM-Radio_W0QQitemZ280059539232QQihZ018QQcategoryZ80741QQrdZ1QQcmdZViewItem