In my research I didn't find anywhere in Canada but I did find a few places that have it.
The Whisky Exchange in London
http://www.thewhiskyexchange.com/Sea...=macallan+1952
Jeroboams Group in London
http://www.jeroboams.co.uk/webapp/wc...=1236366642879
Beltramo's Wines & Spirits in Menlo Park California
http://www.beltramos.com/istar.asp?a...19153#|price_d[vin]
Wally's Wine & Spirits in LA, California
http://www.wallywine.com/search.aspx...acallan%201952