There are some people in the UK that restore ponies. You can open a topic in the custom forum if you want and ask if someone would like to restore her for you
Obviously, it would cost you, at least the shipping, so this is only an option if you *really* want to fix her up
Alternatively, you can ask for someone to guide you through the sculpting process, if you want to try it out yourself?
just some suggestions ^^ but whatever you decide, good luck!