Try finding a 63 comet and taking them off.... , But seriously, what emblems are you looking for? I have a friend building one that has been searching parts for a year now, he may be able to help you out.
Google $50 Roofside emblem http://www.dearbornclassics.com/specials_comet_3.html $50 Hood Script http://www.dearbornclassics.com/specials_comet_2.html
autokrafters.com dearborn classics mac's antique auto northwest falcon parts there are a few others, but i cant think of any right now. also check out cometcentral.com as they are dedicated to the comet.