Is there a CD changer out there that is compatable with the Tribute factory stereo? The mazda changer is too expensive compared to what you can get with Kenwood, JVC, ect.. In particular I am interested in being able to play MP#'s.
Thanks,

yes, there is a product that can be suitable with your CD Changers and can play MP3 songs.
it is XCarLink, mine is iPod adapter, and they have another one for USB disk or other MP3 players.
http://www.xcarlink.com/images/lsq/usbversionmazda.JPG