There's some truth in the theory that the best way to find what you need is to stop looking. Try just meeting people - online in communities like this, and if possible, in 3D at munches and clubs.
That way, if you find someone who looks like THE ONE, you'll already have something to talk about and a network of contacts to check each other out.
My best part time slave I met at a local munch. My beloved Domme-who-subs-to-me first contacted me because she was intrigued by a mail I wrote to a forum like this one. Even my late wife, who I did find through an advert, took me seriously because she'd already seen my name on letters to the contact group forum.
Get to know people; get known; then Eros (or whoever is in charge of D/s love) has a better chance of pushing someone your way.