Dear god has none of you ever heard of the search function? It's really no rocket science.
There is no such server. We don't have 1.5.2, because files haven't leaked (yet), simple as that.
Oh, what is this?
A version that's not out to the public.
Well there have been some servers for a while now that have the new classes....I'm assuming they paid a pretty penny for the early release of the files.