Joshua's Battle with GBS

My 21 year old son, Joshua has Guillan-Barré Syndrome and has had a recent relapse. His symptoms have come on quickly and he is losing all feeling in his body. In order for him to have some relief he needs a multitude of IVG transfusions (plasma) which will cost $90,000 a piece. We have insurance but they only cover a small fraction of the cost. We would grateful for any assistance.