Well here is how I would look at it if I were in the situation.

My goal then is to get a new therapist, and I want T's support in reaching that goal. So I am not going to comment on how I feel about her lack of response. I am just going to ask her again for a response. I am going to ask again for her help.

Whether or not T fulfilled her duty to me with regard to this email, and how I feel about what she did or didn't do, strike me as secondary questions that, if pursued, will irritate her and therefore distract from, and quite possibly interfere with, my main goal of finding a therapist. I would ask myself: "Do I want to be right or do I want to get a new T?" and I would choose the latter.

With regard to options by email: To me, the key question is: Will that be sufficiently helpful for you? If you meet in person, T can give you more details about each option, you can see her gestures and expressions, her tone of voice; she can judge your reactions and respond accordingly, there can be much more interaction (assuming that you are comfortable with her) than there is likely to be by email. Do you see drawbacks to meeting in person that more than offset these advantages? Or maybe these advantages are nice but just aren't necessary, you can get what you need to know by email.

Good!