Hi
You may want to try a local stamp dealer in France, who may sell unused Canadian stamps.
US stamps will not work in Canada.

I don't think you'll be able to use U.S. stamps in Canada ^-^' Perhaps you could find someone from Canada to sell you some stamps?

Hi everyone!
I was wondering where i could buy some canadian stamps as i'm living in France!
I really need them for a VV letter (where no one answered me even with IRC...)
May be, i can use some US stamps instead of Canadian's one?!
Thans for your help!!!