If you have a high quality recording of the parade and the song you are looking for is in your recording. You can dowload a program called Audacity, which is a sound editor/recorder and you can record the portion you want from the parade as a seperate mp3 file. But thats only if you are...
even though ears to the ground is sometimes rumors, this is true:
Dear Disney Guest,
Thank you for your recent product inquiry.
We are pleased to inform you that the information that we have from
Disneyland is we should have the Musical History of Disneyland available
for purchase by May 2nd...