Yes definately check on top of the glove box. Check out this web site
http://www.hamtramck-historical.com/found.shtml for possibly more info. I found 3 broadcast sheets in my Challenger, but I have owned it since 1982. The 2nd sheet was for a different Challenger though so I sent it to the above web site owner, Barry Washington. A super nice guy doing a wonderful service for our hobby.
Bob