Whatever you end up with, make sure to double check it's legality. People like to put copyrighted music on free music websites. I too recommend archive.org and

Whatever you end up with, make sure to double check it's legality. People like to put copyrighted music on free music websites. I too recommend archive.org and jamendo.com. Also check out http://www.freesound.org/ http://www.freesound.org/