It's not updated very often any more, but one of my favorite parenting bloggers has multiple kids with fructose malabsorbtion. She doesn't have the problems that you have the with the school system, but you still might enjoy reading some of her archives. (I particularly remember the one where the other parents were giving her the hairy eyeball when she was telling her daughter that she could not have any strawberries until she ate this roll of Smarties.)