jacq, that scene is both warm and wonderful and sad at the same time. It sounds like she was such an important person in your life, and you are still mourning her loss. I think any T would welcome a letter from a former client, telling them how much they meant and helped during a time of need. To help you grieve her loss, you could write her a letter, and even if you didn't send it, it could still help you.
A couple of months into my therapy with my current T, the ghost of a former T stood in the room with us. Where did he come from, I wondered? I hadn't thought of him for years, a friend and psychiatrist I saw for therapy as a young woman. It was a complicated relationship and it didn't end well. Seeing my current T opened up this still unresolved relationship. I did some grieving in therapy and wrote my former T a letter. Didn't send it (don't know where he is), but the letter was really cathartic. Maybe a letter would help you too.
((((jacq))))