Just make your own sandwitch and take it with you at work.
My favorite Sandwich:
Two slices of organic brown rice flour bread
Organic omega-3 enriched butter from Japanese grass-fed black cows
180g patty made with pure organic kangaroo meat, kangaroo has to be shot in the wild!! No bred kangaroo
Two slices of organic goat cheese
Organic Japanese tomatoes
Hawaiian organic cucumber
I have 2-3 of these every day.