Strikes me that you need to do one of two things, either:-
(a) Learn to become less picky, or
(b) Learn to prepare your own packed meals, and buy a couple of insulated flasks and/or lunchboxes. There are many companies who will sell you compact food containers that'll keep things either hot or cold. Whilst many countries object to unapproved food import, I've never heard of one that objects to an empty lunchbox with a few crumbs in it.
(or some combination of the two).
Let's face it, a great many people have this problem for one reason or another, due to food intolerances, diets, religious needs, or simply that they don't like certain common foods. You're not alone.
G