If you have a Meijer near you may be able to snag some great allergy-friendly deals. It appears that they are discontinuing some of their allergy-friendly foods and have a lot marked down.
This is what I saw at my Meijers:
Enjoy Life Cookies and Granola
I.M. Healthy SoyNut Butter
Various Gluten-free baking mixes
They had a few other things on clearance that were not outdated, so if you want to stock-up this would be a great opportunity!