Hello Geoff, Utah coal:
Jones Firewood Yard 4881 W. Rosecrans Blvd. Hawthorne, CA 90250 PO Box 328 310-372-0410 310-575-4722 AFAIK the bags were 40#, try your local supplier or farrier supplier -- good luck! All the best, John Coughran, 310-318-1547, 1525-A Artesia Blvd, Manhattan Beach, CA 90266-7160, USA