Hi folks. I realize this thread has been going for a while but I just registered as a member today and wanted to share some barrel info that may be helpful.  I just ordered some 9.5 gallon barrels with gasketed, screw on lids from Paul@ontariorecycling.com  These would be slightly larger capacity than the 30L size. Physical dimensions were listed as 18" high by 14" in diameter. They looked good and were certainly priced right at $9.95. If you're interested, you can contact him direct or search "plastic barrels" on ebay.