I am not sure how old your daughter is but the Shriners have been a huge help to both my sister and daughter in getting help with medical issues.
My sister's son had an accident at a sitter's and ended up with a horribly burned arm. They provided not only for the medical interventions he needed but also transportation to the hospital across the country. They picked them up at their door and drove them to the airport and someone was waiting at the airport to take them to the hospital.
My daughter has had medical testing done on her children for various learning disabilities. Also these wonderful men picked her and the kids up and took them for their testing.
If they cannot help they may be able to point you in a direction for assistance with medical supplies.
As far as a service dog. I would definately contact the organizations that others have suggested. Perhaps a note off to AKC would also put you in touch with organizations involved with service dogs.
Hope some of this helps. Please keep us posted. My thoughts are with you and your family.