You could also have a look at the Folmk Leads site:
http://www.folkleads.org.uk/songs_a-d/croppers_songs/cropper_lads_music.html

There's a couple of songs there as well as an article written by my wife, mainly about Yorkshire, but you might find something. She studied the Luddites as part of a local history course, so she may have more information.