There are many different types, and you're right: They may be difficult to find. Perhaps visit some local occult shops and see if they have any local listings of sorts, like a bulletin board.
You may also try searching for reiki healers.
A friend of mine follows a Native American tradition, and actually claims to know of an herbal treatment to prevent tinnitus and hearing loss due to loud noises, but he has refused in the past to tell me anything about it. But that does put the possibility of seeking Native American healers as well.
And as always, be very careful! There are plenty of scams out there. As 'alternative medicine' practitioners, they cannot guarantee their work or claim actual medical treatment. Some may read carefully in their own work because of this, while some others may take advantage of vulnerable people.