Help kitten Rei with life saving treatment for FIP

In August I adopted two 3.5 month old kitten siblings who had been feral and were fostered by a local rescue group. They are brothers and very attached to each other.  They needed to be rescued together as they are so close emotionally. Rei is the smaller but braver kitten and always helps his brother Ki learn what's safe. 
Rei has been diagnosed with feline infectious peritonitis (FIP), a normally fatal disease. There is an experimental drug treatment called GS 441524 that has a high success rate. It is over $3300 for 80 treatments. 

EDIT: With the help of some very kind people i have access to this treatment at a much better price than our vet quoted...., $1500. I am asking for half and will fund the other half. The campaign goal is now more within reach! 

These kittens are my emotional support animals and they have made my quality of life so much better during this pandemic isolation. I am legally blind so I don't get out much even without quarantine, and these guys are everything to me. Please help me save Rei so Ki can have his brother and i can have my little family.  Or please share the campaign in case a benevolent soul wishes to help! Love to you!