Here's a good place to start if you are looking for classical Pilates.

This directory lists lineages under which teachers have trained, and people who have different lineages will have different teaching styles. It's probably worth calling around to ask what kind of experience a teacher has with injuries similar to yours, discuss with them where you are with your PT and what your Dr. has said you can/can't do, and of course, your own goals for where you would like to be.

Completely agree with Tulip that one-on-ones are worth it if your budget will allow.