I don't have any suggestions for this. But I thought I would mention a resource for kids with disabilities & educational concerns. I don't know if this will be useful to you. But it's worth checking out. If they don't have anything to offer they may well know who will:

PACER Center - Champions for Children with Disabilities

Also, here's a link to an article, from PC's archives, that discusses how to handle panic attacks in children:

What to Do When your Child is Having a Panic Attack