O.k. I just went shopping today and found some things which might help you.

Eggs
Atkins or an off brand of their chocolate shake powder mix
Atkins or off brand of choc bars(but be careful because they have more carbs so eat them little by little)
Pickles
I got a lot of meat of course
I'm not sure about peanut butter because it does have some sugar in it, but I hope some of that small info helped.