I found this website that allows you to search multiple junkyards across the country, including a picture of each match (usually). it currently turns up about 80 AMCs, although most of them are jeeps. Happy hunting!
http://row52.com/home
P.S. It doesn't appear to be 100% accurate, as it supposedly searches the junkyards I go to and it didn't turn up any Eagles. However, when I search the local junkyard's own sites they list a couple Eagles.
Many yards also put the Eagles under Dodge, Chrysler, Mitsubishi and GMC