This may help. The post has some ford part numbers listed and says that you can email the guy with questions. They may be able to help. It's an ebay post for a factory Ford(clarion) cd changer. The one on top looks exactly like the changer in my 2000 SEL.
http://cgi.ebay.com/ebaymotors/ws/eBayISAP...item=2463940458
http://cgi.ebay.com/ebaymotors/ws/eBayISAP...item=2463940458