Depending on what you mean by civilian MRES, yes. See
http://www.cieux.com/bm/quickMeals.html
for links to quickie meals with little or no preparation.

"Real" MREs have pretty much a full day's calories, fat, and sodium in each meal, too much for my needs. I choose HeaterMeals because they have around 700 calories per meal; there might not be enough content in each meal depending on activity, though.

I haven't eaten a real MRE. HeaterMeals are okay. I suggest buying samples of the stuff you're interested in and trying them out before you need them. Find meals that fit your needs (real or projected), then stock up. The list in that page I refer to has kosher, gluten-free, and other specialty meals in addition to meals for more nearly normal diets.

Phil