I just checked REI and the entire Mountain House line is currently available with no waiting, including both eggs and lasagna, as well as the Mountain House "72 hour emergency kit." The food in in foil/mylar packets, not cans.

I obtained canned MH food a few years ago. I eventually opened them up out of curiosity, since they were approaching their due date - the cans contained the normal foil packets. The cans simply provided a bit of extra durability.

Remember that the chief virtue of freeze dried food is light weight. This is useful if you are carrying the food on your back. If you are in any situation where water is not plentiful, freeze dried items do not work so well. Backpacking in desert conditions, I have often just carried canned goods, since you will be packing water anyway.

In my emergency stash, I do keep some freeze dried stuff, packets not cans, but most of my stash is normal canned food. I figure water will be at a premium in most disaster situations.