I bought gluten free (King Arthur) flour on Amazon. And I got the xanthum gum there too. The King Arthur flour site has a whole section on gluten free baking. I feel bad for your husband. A few months ago I was having "issues" and tried gluten free to see if it helped. The hardest part was giving up real yeast bread. And it makes it more difficult for eating out because there seems to be gluten in everything, even soy sauce and Miracle Whip!