I received some nice, USED, euro cans from Maine Military Supply. $15 each, $23 after shipping and handling. This is cheaper than most people, and they actually have them in stock.
I purhased some 3-packs @ $45/pack and they arrived via UPS in about a week!
https://www.mainemilitary.com/Default.asp?
Used, yes. Authentic military surplus, yes. I think German but I can't say for certain. They all say 20L on the outside (5 gallons). They have some surface rust around the handles, but then again they ARE surplus.
g2busmc pointed me to this place - they have quite a bit of nice stuff! I didn't want to post until I had them in hand in case they were rusted out or something.
Worth checking out if you want some Jerry Cans. Supposedly after January 2009, there is a restriction on what kinds of cans can be sold due to emissions or spillage issues with the older kind. A guy at the gun show had a new tan military jerry can - plastic - and wanted $45 for just the one! $45 for a gas can... sheesh! These guys are cheaper than Cheaper Than Dirt, *AND* they ship! CTD won't ship to VA because of some emissions law or something in DC. Ah well...