Your local courthouse might have a list of approved therapists, look for one who specializes in reunification counseling.

Most fathers, if encouraged, start developing a much closer relationship with teh kdis, interacting in a very masculine, fatherly way with the kids, than before the separation. They just need time and a little encouragement to do thier own thing, and they start to develop a rhythm. Even the most disengaged ones start to pick up the relationships and have fun with them. If you're doing well together, that's the way to work it... it falls apart when one separated parent tries to control the way the other one lives, parents, makes life choices... they start getting angry about whether or not they're allowed to feed the kid McDonalds or stick to a strict vegetarian diet ... whether or not to do homework right after school... choose to introduce the kids to their new friends or not... etc. When parents can relax and let each other do their own thing without getting angry, jealous, punative about it, it works much better.