Buying ready made ballast bags was definitely an option but the price of getting 400 lbs shipped to Canada plus the US $ exchange rate was causing grief.
I managed to round up a 4 pails of used tire weights (aprox 350 lbs) from a friendly tire shop
In my quest I stumbled across photography sand bags on Amazon.
Zip lock freezer bags, used tire weights, and some photography sand bags is all that was required to make some homemade lead ballast bags. The sand bags were rated for 20 lbs each, but easily handle all the tire weights I can stuff inside the doubled up freezer bag zipped up inside the sand bags.
Each canvas bag ended up at 31 lbs.