Help save Barbie my rabbit

My rabbit, Barbie ( I named her when i was 5) has been a loyal friend to me for about 10 years. She has been active until recently when she started having cataracts and constantly started bumping into items around. She underwent scans and she needs one operation. My parents are not willing to pay for the operation but I'm determined to help Barbie until her last breath. I have saved up $500 for her but I need more for the operation and treatment. Please help Barbie. It is hard for me to come up with money very quickly to help Barbie as she needs the surgery within the next month or so.