hey I've done some research for these kinds of programs before, so maybe I can help
unfortunately there aren't that many programs, especially if you don't have a good phil background, but Oxford has a pretty established group. http://users.ox.ac.uk/~ppox/teaching/gradstudies/index.html
There are a few options, if you don't have much phil background you can go for the one year M.St ; if you have some experience then there's the B.Phil. I think both can potentially lead to a D.Phil, which is an equivalent of a Ph.D.