Help get Avery his butt surgery

My 3 month old kitten has a prolapsed anus. Which basically means his butt is coming out, probably because he was born tailess. This condition, although it sounds kind of funny, is very painful for him and will lead to severe incontinence. The only fix for this is surgery and it's pricey. I really want this super sweet kitten to live a good life, I'm just going to need some help. Please donate and share! Even a little helps! Thank you all.