As far as new drums go, the Cary Company had the best online prices that I saw. Investigate locally too. I was ready to give up finding good drums locally. Then I spoke to a Brethren from my same hometown who told me where to look. The place is a hair care products manufacturer. They dont advertise the barrels, just word of mouth. Closed top drums that were previously filled with light mineral oil. $20 a barrel all day long. No liners!
Don't give up looking. There may be good barrels right around you.
UDS, mini wsm, 22.5" weber kettle