In CMHQ report No. 141 it seems to indicate that the production of the Windsor Carrier was only to start in Sept. 1944. This is after the end of the Normandy Battles.
http://www.forces.gc.ca/dhh/downloads/cmhq/cmhq141.pdf
“83. During the year trials were made with new types of carrier. The Canadian Windsor Carrier was submitted for trial in February (C.M.H.Q. file 1/Carriers/1/2: Notes on Meeting to Discuss Windsor Carrier, 1 Feb 44). This is similar in appearance to the T16 Carrier but is actually a lengthened version of the Canadian Carrier Universal Mk II, and has greater stowage capacity than either the T16 or Universal (C.M.H.Q. file 24/Reports/1/3: D.D.E.M Memorandum, 30 Apr 45). By April it had been decided to adopt it as well as the T16 as a tower for the 6-pr gun, and the British Ministry of Supply had placed an order for 5000 in Canada which would replace the Loyd Carrier in this role; the Windsor would not replace the Universal Carrier. The Canadian Army decided to follow the British in this policy (C.M.H.Q. file 1/Carriers/1/2: D.Q.M.G., C.M.H.Q. to D.C.G.S., C.M.H.Q., 15 Apr 44; Chief of Staff, C.M.H.Q., to Under-Secretary of State, War Office, 28 Apr 44; War Office Letter, 2 Jun 44; D.C.G.S., C.M.H.Q. to D.Q.M.G., C.M.H.Q., 10 Aug 44). Production of Windsor carriers was due to start in September (ibid: Tel G.S.W. 321, DEFENSOR to CANMILITRY, 28 Apr 44). The British intention was eventually to replace all existing types with the C.T.20 which was being developed (ibid: War Office Letter, 2 Jun 44).”