I buy from Micheals, CM and CTMH. There is a wonderful little shop I found in Goderich, but I dont get there often.

For online, R&R Scrapbooking ( http://www.scrapbooking.ca/ ) was recommended to me by someone I got talking to in the scrapbooking aisles at Micheals. I have yet to order myself, but I hear from other people as well that they are great.