My Father spent a few weeks over in England and just returned last Friday. When I found out he was going I asked him to pick one up for me. He found an army surplus store around the corner from his Inn and had no problem getting it. Shelves were lined with them apparently! I have found a few web sites based in the UK that sell them but was a little leary myself of buying one untested. The price on the box is 8 pounds, about 16 dollars I guess. Cheaper than 3 MREs at 7 bucks a shot. I just have to find a supplier that has reasonable shipping. The manufacture date on all of the components are 2003, so I don't think that there will be any issues with spoilage. No swelling of the packages or pouches.
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If it ain't bleeding, it doesn't hurt.