Best thing I can suggest is to go to Barnes & Noble book store OR the library (reference section) and find a book called Writers Market 2002 (or 2003 if the new one is out now). Check their categories & see what New Age/Occult selections there are. That should list who to contact, what they're looking for, etc.
Then go to the section on metaphysical and see who's been publishing the books that are on the shelves there. That'll give you a good idea as to what size the publishers want in regards to page count, what themes, styles, etc.
I think you can get a pretty good idea from that. The Writers Market books are very good, even listing smaller publishers. They won't have 100% of the publishers in them, but they do have the major ones for sure.
Good luck, I know writing is hard work (done some short stories myself, but only published in fanzines).