W.S.
Just my 2 cents, I'd have to agree that they don't need to go to preschool, unless you are wanting her to because you want a break or you work or whatever. My 4 yo knows how to read already and I have never sent her anywhere. If you are looking for socialization, you can do playgroups or lessons (like gymnastics) too.
I don't know of any specific schools, so I know I'm not answering your question, sorry! I just wanted to encourage you not to feel you must send her to preschool, I know I felt pressured to do that because "everyone else" was doing it. I am so glad I had this time with her, she is so much easier now than when she was younger!
Lynn