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.
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.