There Ought To Be a Law Song...Please Help!

I have been trying and trying for years to get this song. There doesn't seem to be a trace of it anywhere! I know it exists because it's in the movie. Even if it was made just for the movie it still was made and exists. I just don't understand how a song can be untraceable. If anybody has a mp3 link or knows where i can buy it, please let me know. Any help would be greatly appreciated. :-)