Darwin's Fight

This is Darwin or Mr. Darwin as I call him. He's a 1-year-old sphynx, my first cat I've ever owned, and the absolute sweetest boy. About 2 months ago (July) he seemed to have an upper respiratory infection. 2 rounds of antibiotics later and he seemed better but still wouldn't play. The vet decided on round 3 of antibiotics and a steroid to break the high fever. Around September 5th I noticed him getting wobbly when he walked. On September 14th he went to get off his perch to go to his litterbox and fell. He made it about 3 feet and couldnt hold it in. I took him over to his litter box and he just sat down a minute and started clawing into the carpet. He shut his eyes like he was trying to steady himself but just started violently swaying back and forth along with having diarrhea. I rush to our emergency vet (its 10 pm). After hours of waiting and tests he tells me he thinks it's very possible its FIP.  Feline infectious peritonitis (FIP) is a viral disease with a 95% fatality rate. It is caused by a type of virus called a coronavirus (different than the human form), which tends to attack the cells of the intestinal wall. There is no definitive test to determine if he has this, but going off bloodwork and symptoms it doesn't look good. The vet mentioned an experimental drug that in clinical studies has shown but wasn't sure of its availability. He is now unable to walk very far as his back legs give out and go to the bathroom when I place him on a pee pad. I hand feed him his meals and take him to the bathroom as needed. After sleepless nights and constant research, I found the experimental medicine along with a group of people who have fought FIP with their cat. It has an 80% success rate in clinical trials and I am willing to take the chance to save him.  Here's where I need help. The medication is $90 per vial and he will need 2 vials a week for the next 12 weeks to replicate the trial. I fully understand that not everyone is in a situation to assist but anything helps.