Large glass jars (pickle jars?) (Shawville, QC)

I have a 2-gallon jar that I keep my flour in. When I buy a big bag of flour, I'd like a few more that I can stick in the back of the cupboard for the six weeks or so that it takes me to use the rest of the flour (I think I need three more to be able to empty the bag as soon as it's opened). I'm in Shawville, but I go to Ottawa for work and other errands once a week, so can work out routes to pick up.