I bout it at Totem a couple years ago. Looks like Home Depot has it:
http://www.homedepot.ca/product/ston...le-369l/968827
You will also need this:
http://www.homedepot.ca/product/ston...t-946ml/980211
I got mine in a smaller container, if you just have the standard 3 step concrete landing, it is all you will need.