brachycephaly baby flat head

My boy was diagnosed with brachycephaly which means flat head. Treatment is done up to 18 months of age because the head hardens, and at that age the baby's head stops growing and impede the treatment. He is 13 months old and I am sad because the helmet costs 2,500 and health insurance does not cover the value. Any financial help is welcome. Please help my angel get the correct treatment because his head is very flat and will eventually cause problems. Thank you very much!