Help save Walter the Bengal from FIP

Walter is an 11 mo old Bengal kitten. He was just diagnosed with FIP, a fatal disease. There are new drugs out there that are curing FIP but big pharma won't release the patent for veterinary use because they can make more money finding a human use for it. The drugs can be found but they cost hundreds of dollars for just a few doses.  Walter is the best cat, he used to love causing trouble, opening kitchen drawers, climbing on top of doors, and teasing his pit bull big sister. He's always very sweet and loves to sit in my lap while I work. Now though he barely eats and hardly moves from 1 spot all day. Please help me save Walter's life, any amount helps!