This is from CMHQ Report 141 para 95:
“The Amphibian Jeep (5-cwt Ford) was first considered by the Canadian Army in May 1943, but this like other amphibian vehicles was to be supplied by 21 Army Group (C.M.H.Q. file 1/Veh Amph/1: Extracts from Agenda for third meeting Cdn M.T. User Committee, 4 May 43; S.D.3, C.M.H.Q. to Trg 3, C.M.H.Q., 5 Oct 43). The first four were received in October 1944 (Historical file: Cdn Units 21 Army Group, "A" and "B" Vehicle Position States).”
In Appendix “C” it shows the Canadian Army in NWE holding three “Cars 5-cwt Amphibious (Ford)” at the end of December 1944.
http://www.forces.gc.ca/dhh/downloads/cmhq/cmhq141.pdf