www.mercola.com (be careful, he also recommends cleaning/filling RCs with Biocalex...I would not do this). BUT, you should be able to find a dentist through his site or his office.
Also, check out:
www.hugnet.com - they can give you a list of Huggin's qualified dentists. Note that I think they are the ones who determine if the dentist is "Huggin's qualified" and some dentists may not belong to their little club and may be good too.
Read: The Root of Disease" by Levy and Kulacz. EXCELLENT BOOK. There's resources in the back of it. I'd read this book before having RCs removed. Very good tips on pre- and post-care.
Best of luck to you. Share your story here...let's us know how it goes!