http://www.nfl.com/
Do to licensing only users with NFL Field Pass can get games on radio. Yo Bro', try to find you a Sportbar in the area that is carrying the game.
Also, if you are in Dallas, try AM1130 out of Shreveport. It is part of the Saints Radio Network.
Saints Radio Network Stations:
http://www.neworleanssaints.com/custompage.cfm?pageid=45