Believe it or not... I just ordered one of these from Sears! I ordered it with the extension and got the main rack for $139.00 and the extension for $59.00 plus free shipping to the nearest store or depot to me.
I searched Google for Rola Rack Canada and it was the first hit. I looked around and this was the cheapest option and you cant beat free shipping!
Looking forward to it...our last trip with the whole family was a challenge to pack all out gear inside!