From Don Glut and Pete Von Sholly comes this info that I meant to pass along ages ago (sorry boys!):
Each D. Tracks album contains 12 PC (paleontologically correct) songs by the Iridium Band (Pete Von Sholly and Don Glut).
The D. Talks cassettes feature "classic" paleontologists like Riggs and Colbert talking about their lives, careers, discoveries, etc.
All cassettes are $10 plus $1 postage & handling and are available from Fossil Records, 2805 N. Keystone St., Burbank, CA 91504-1604. I'd suggest dropping Don a line to check on availability first.