What other means? If not available through OLGS then I should buy thru KS then. $9 USD to Canada shipping is kinda high.
You can purchase most (if not all) of the deluxe additional content here on BGG through the Geek Store.
The difference is that you pay $8 for the deluxe content (compared to the $6 difference if you had simply backed the deluxe version of most of the games).