I think the best way is usually just word of mouth. My kids used to go to a pediatrician who was a homeopath (we've since moved). He took insurance and was also a "regular" doctor. I'm not sure if he was listed on any websites.
I found out about him from the "finding your tribe" boards here. That would be the first place I would look. Other places would be to ask at health food stores or places like that.