I get all my drums locally from Windsor True Value for $7 each unlined. They call them burn barrels and have 60+ on hand all the time. Check your local tractor supply house or feed supplies houses and ask for burn barrels. These even include the tops and rings for $7!
LINKY : https://plus.google.com/111149392689...ut?gl=us&hl=en
This is in Virginia since I didn't mention it earlier.