10 points! Where can I purchase 100% authentic UGG boots for sale online from a site that ships to Canada?

Does anyone know (preferably from personal experience and/or knowledge) some sites which sell AUTHENTIC discount UGG boots that ship to Canada? I am looking into purchasing a pair of UGG ultra short/tall or one of the ultimate short/talls in USA size 8 because of the good lug sole. Please list reliable UGG sites that sell authentic boots. I would also prefer sites that ship free to Canada, and sites that sell the ultra short/tall in size 8. Thanks so much for your help! 10 points!!