Get your traveling shoes on and your phone wire plugged in. Your best bet to find a shaman who does shamanic healing I'd think is to go to/call New age-Occult type stores, Herb stores, Head shops in your area and ask the people that work there if they know any one who practices shamanism. Also look for alternative therapist or indian reservations in your area and ask/call them as well. I'm sure one of them could guide you to a shaman to learn more about shamanism.

If you travel a lot. Theres many shaman/witch doctors I've read in villages through out South America and Africa and in probabaly every country. There is many practicing shaman all over but I think if you truly want to learn about shamanism you should find someone who was born into it. Who has lived, seen, and done what they preach so you get the best information and advice.

Good luck.