Hopefully I am not telling you something you've already tried, but I had persistent ITB in my left leg until I strengthened the adductors of the inner thigh... this kept my knee from sagging inwards upon contact with the ground which results in the ITB "pull"
https://www.youtube.com/watch?v=8lRqe1fnFpk
https://www.youtube.com/watch?v=8lRqe1fnFpk