Just read your other post too...I'm so sad for little Ellie. It is awful watching them suffer in any way. I wish I had advice. Have you tried fish at all (probably have)? What about a homeopathic remedy called ProAller - any interest in that angle? I'll link you to that nutritionist's products - I don't know if these will be on target or not, but I don't know what else to offer......
http://www.askariel.com/pages.asp?pid=allergies