Of the big box stores like Home Depot or Canadian Tyre - I always go to Canadian Tyre - not out a sense of patriotism but because they tell you the exact Aisle to go get products which you can search from their website.
Today I bought this but I bought it from Home Depot since Canadian Tyre was closed due to the snow storm. I bought three bottles since this stuff is amazing. Any manufacturer would do - strong white cleaning vinegar is fabulous!