Hi Mich,
I don't know if this site is going to help you much but it has helped a lot of members here.
http://moodgym.edu.au/welcome
It is totally free and suppose to help with depression.
I am sorry that you have come close to exhausting the options of medication. And I am sorry about the psychotherpy situation too. It seems that there should be something that could help you.
There is a good book called "The New Mood Therapy" by Dr. Burns. Also found by the name, "feeling good". You might find that useful. I read it years ago and it really helped me. You might want to give that a try.
I hope that coming here is helping you. It is nice when you know that people understand your situation. So do continue to post.
I hope that you are having a better day.
Hugs, Karen