While not explicitly CANZUK related, I included the above article as Australia has also recently bought in to South Korea's military supply, with a purchase of "$6.19-billion program to build 129 infantry fighting vehicles, many of them [to be] constructed in the Commonwealth country."
CANZUK nations could certainly benefit from having similar, or at least overlapping, military tools. It will be interesting to see if Canada is serious about rearming using non-US equipment.