Try Lightning Label in CO. They should be able to send you down 20-30 labels so that they can test on their bags/boxes for their frozen food product.
Having been in the manufacturing side of the food industry for too many years I can tell you that the wrong labels can cause you to loose your butt. I learned the hard way with our first launch of frozen tamales back in 2000.
First the adhesive has to be right for the application and second if the labels are not top coated they will basically peel and fall off the product during the freeze/defrost cycle of the freezers.
Don't deal with any label company with food labels that first don't ask you a long list of questions. Questions like, How what temp will the labels be applied? Etc....If they are not asking questions like this then find someone else.
Companies Ive used in the past:
Houston Label-Houston, TX
Lightning Label-Denver, CO
Consolidated Label- Atlanta, GA ask for Sally