Black Japanese Maple is evergreen (or is it everpurple or everred?), grows 10 feet tall (10-12' wide) and is hardy to
zone 5. See Acer palmatum 'Nigrum' in http://www.monrovia.com/PlantInf.nsf/08510e01e61cc962882571a9005a9153/e5973fe91b6f84ec8825684d0070268d!OpenDocument
While Monrovia is a wholesaler, my local nurseries will special order from them when the local nursery does not carry the variety that I want. You could try to see if your local nursery can special order from another Canadian wholesaler or from Monrovia.
Luis