Hey, I found myself going through every fetish imaginable at one time and stumbled across http://www.sickestsites.com/main.htm it breaks it down categorically and some of the sites under the link sections are also as extensive if not more. Though as it comes to if your looking for people to participate with you I think the only thing you will have much luck with is the amputation and that is kind of a shoot off of the body mod people, with the whole piercing and tattoo group. I would have to agree though with most people here as people tend to think of bdsm as something dangerous or unhealthy (though that is slowly changing) people inside the community are very serious about keeping it safe sane and consensual. Best of luck though!