hello there I am Arty_4's Domestic 9er. Anyways I am also doing reasearch on my family's war history and have found these websites very helpful. I hope that I am not sticking my nose where it doesn't belong. I am sorry If i am. But I was using this site to see if there was anything here about my family as well.
I have only been researching the First world war for soldiers, there doesn't seem to be a lot on the Archives of Canada for WW2.
Here is the link for them...http://www.collectionscanada.ca/index-e.html
Secondly, if you go to http://legion.ca/asp/docs/home/home_e.asp they have a message board there where thousands of people from all over Canada are looking for lost relatives as well. Try posting a message!
Thirdly I know there is a number for the Archives of Canada, where you can call and get their service record sent to you. You will need their name and unit, and also a credit card. This phone number is on the archives site somewhere.
Lastly, when all else fails, Go to Google and put in the name of the person you are looking for. If there were any newsreports, or any mention of him anywhere that should find it. I have found actual letters from people my grandfather was billeted with in WW1 writing home to his parents.
I hope this helps, Good Luck in your search. It is a very painstaking process, as well as frustrating.