Help Piglet Beat Cancer

My sweet Himalayan/Siamese cat, Piglet, has a rapidly growing sarcoma (as of right now the vet can't give us any more specific information; they intend to examine it further upon removal) on one of his hind legs. When we initially found it, it was only in the skin, but by his first follow-up visit, it had already begun to attach to muscle. The only way to be sure to get rid of it completely is amputating the leg. Piglet is my baby and I'll do anything to take care of him. Both my husband and I work barely above minimum wage, and Piglet's surgery is set for April 25th, and the whole $1291 is due up-front. Any help we can get is so much more appreciated than I can possibly say. Piglet has been my friend through so much, I just want to be able to help him however I can.