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Here is some on E-Bay right now.
http://cgi.ebay.com/Mermite-can-cooler-saddle-bags-M38-151-food-veitnam_W0QQitemZ270121833939QQihZ017QQcategoryZ36065QQrdZ1QQssPageNameZWD1VQQcmdZViewItem
You can still find brand new ones surplused for $60-$70. The top seal will cost you $20+ if you get one...
I found a German version of the Mermite in a surplus store a month ago. If your goal is sealed liquid transport, it might be a better way to go since it is about 1/3 bigger inside.
I saw no markings on it and haven't found any info since. This is the place that had them...