Hallo,
Here a cover sent from Australia to Canada. Looks to have been re-used inland.
Porto inland Canada was 8 cents for the first once from jan 1 1972 to sept 1 1976. This one went through the mail on 22-12-1974.
You can see the sender has the same name as the receiver. So I am pretty sure this cover arrived in Mississauga.
I 'm not a member of any other forum but two in Germany.
May be a chance that somebody has the rate from Australia to North America/ Canada?
Thank you
Sylvain