You know, you could Google this T and contact her if you find anything. You don't need to tell your daughter about it. If there is a chance she could still see her, I'd try to at least find out.

I think you're doing the best you can. Maybe something else you could do would be to to ask your daughter (or work on it together) to make a list of the qualities she'd like in a new therapist. I think anything you can do to help her feel like she has some control in the situation, would be beneficial.