Just spotted this thread and nothing new to add really but I will endorse those 'Look What We Found' packed meals - delicious and will last for ages without being refrigerated. The same can be said for the good old British Army 24 Hour Ration Pack as sold on eBay - I've bought them from there and am no stranger to the issued one and can confirm that they are, indeed, right. The only thing with some (but I don't think all) eBay suppliers seems to be the Best Before dates (if you get concerned about such things).
One other point regarding the title of this thread. As I think somebody else mentioned, the term MRE originates from the US forces description of their ration (ie. Meals Ready to Eat) - I might be a bit out of date with such things but in my experience, they were pretty horrible and didn't quickly earn the revised title of 'Meals Rejected by Ethoipians' for nothing. Sorry for the squaddie humour if you get offended by such things.
