MP3's of this song, and many many other Simpsons songs are readily available from Kazaa or any other Peer-to-peer file sharer...

Or TDf... if you become a member and PM me, I'll be more than happy to email you the mp3 that I have... There's really not much to the song but one verse and the chorus....

Come gather round children it's high time you learn
About a hero named Homer and a devil named Burns
We'll march till we drop, that girls and the fellas
We'll fight to the death or else fold like umbrellas

So we'll march day and night by the big cooling tower
They have the plant but we have the power

Lenny: "Now do Classical Gas!"

LOL