I'm really liking the look of Mindi's can, too! The reason that one of mine tips, is because of the hose from the rain barrel and the watering can's handle interfering with each other, and the fact that the can was light weight plastic, and so had nothing to keep the hose from tipping the can, unless I'd wait there until enough water was in the base to prevent a tip (which undermines the plan of alternating between cans while the other fills). Being able to drop the handle would probably eliminate the tip over I experienced with that one can. The other can is not as well balanced, and I have other smaller cans that don't work so well for alternating, either, as they fill before I get back.
If someone finds a source, hope you'll post it! I'll look too, when I get a chance.