I suffer from anxiety and it was hard for me to overcome perfectionism in college and graduate school. When you're on a scholarship that will be taken away if your grade dips below B+ (or A-, etc), it's not exactly irrational to feel the pressure.

It's easy enough in our area to get an appointment but finding a competent therapist who actually cares about his/her clients is very, very difficult.

Have you looked into therapists in your area who specialize in eating disorders? Depression and anxiety are common co-morbitities and most of them would be highly trained in CBT and they should be open to working with adolescents.

I hope your DD finds the support she deserves very soon.