I just purchased a used 18-gauge Drum from APEX Drum Co in Commerce, CA

$55 bucks with lid...

Its already burned out (twice, with a water based rust-inhibitor on the inside)
And sand-blasted (although they also sprayed some sort of coating on the outside)

Nice folks, showed me a bunch of barrels and we talked about the project...
then they were like "probably one of these..."

Apex Drum Co
6226 Ferguson Dr
Commerce, CA 90022