Support Pc's Surgery: Amputation Needed

My son’s cat, Pc, is 8 months old. She’s the sweetest little cat that has become my son’s best friend. Sadly, she was injured, so we took her to the emergency vet, and we were told that her right hip is broken as well as her knee. We will not be able to save her leg, so it needs to be amputated. We are devastated because of this. We want to save her because she is a part of our family. Please, if you can, anything will help us so we can get her back to being the healthy, playful cat that we love.