I have a very good Mexican friend who has a son with scoliosis. They are trying to avoid surgery and swimming has seemed to be quite helpful. Mom holds 3 jobs because dad left. She has another child as well. It is painful for the young boy to sleep on his current mattress which is old. Can anyone suggest type, brand, price, and where she might find an appropriate twin mattress for someone with scoliosis. I plan to pay for it.