A very clever fellow who wishes to remain anonymous has solved the mystery and unearthed the following link:
http://tela.sugarmegs.org/darkstar/ It's a link to downloadable wma files. I've not tried it yet. Only 5 of the Lightfoot shows appear to be available, but one of them looks like the mid-60's WB demos. BTW I'm posting the link with the anonymous clever fellow's permission.