You might try the word of mouth route by asking doulas, childbirth educators, prenatal massage therapists, infant massage therapists, etc...
You can find a list of doulas at
www.dona.org and at
www.doulaworld.com
You can find childbirth educators at almost every hospital. I would particularly look for those trained in Birthing From Within, but Lamaze and ICEA and CAPPA usually attract people interested in non-hospital settings as well.
Do you have any freestanding birth centers near you?
Also, try emailing Barbara Harper at Waterbirth International
www.waterbirth.org for any recommendations of homebirth midwives in your area who she knows do home waterbirths in your area. Even if you are not planning a waterbirth, Barbara is a great resource and works with people to educate about waterbirth across the country and the world.
warmly (from another 37 weeks pregnant mama),
claudia