Sir Charles, I picked my copy up at the Fort Macleod tourist fort about 5 yrs ago. It says it was published in 1997 by the Lethbridge Historical Society, Box 974, Lethbridge, AB. T1J 4A2. They may be able to mail you a copy. It may also be in the library.... The Last Great (Inter-Tribal) Indian Battle (Occasional Paper ; no. 30) ISBN 0-9696100-7-6
Hope this helps.
Cheers!