ANV in ankle– talus

Hi, In Jan 2003I was diagnosed with AVN in right talus ankle — I am currently wearing a air cast and have a bone stimulator.. So far there is no progress. Does anyone have this condition… I am looking for a good orthopedic surgeon… I have seen 4 doctors and all of them are baffled. I am really getting frustrated and need support. I am concerned that I am going to be disabled for the rest of my life… Please help!Thank you, Nance