I know there are lists, but not everyone thinks of getting themselves on that list! Also unless you live in those areas, it doesn't help much. So rather than relying on a list to tell you I do my own research.
Try calling up a couple of places and explain that you are looking for a family/individual counselor but that you do find it important to find a counselor that is more open minded and it helps to ask if they have LGBT friendly counselors. Even if the counselor is not familiar with Poly I have found that those that are experienced with the LGBT community are more open minded and willing to put in the time to do the research. In the end, you just want someone that is interested in helping you have a healthy relationship, mono or not, so being open minded and non judgmental on your relationship style is a good start!
Me: Late 30s pansexual poly.
DH: My husband of 19 yrs and father of 3 teen girls.
DC: LDR of +4 year