Individual paperback novels, omnibus collections, and kindle editions are all available through Amazon CA and US

Amazon.ca (Kindle)
Amazon.ca (Paperback)
Amazon.ca (Omnibus)

Amazon.com (Paperback)

Omnibus collections are available at McNally Robinson in Saskatoon and Winnipeg or through their website

Link

Paperback copies of the first two novels are available on Walmart.com

An Inconvenient Mountie

An Indestructible Mountie

Paperback copies of novel 11 are available at Indigo-Chapters-Coles

An Incommunicado Mountie

All omnibus collections and some individual paperback novels are available from Barnes & Noble

Link