How can I play on a 3.3.5 WoW private server?

I registered for a 3.3.5 WoW private server (Divinity-x AKA Project Defiance or the "New Echeloned WoW"). I have a 4.x WoW private server, but, I don't know where to download it, because I used the new client downloader. Not the one where you can choose to download "World of Warcraft" "World of Warcraft : The Burning Crusade" or "World of Warcraft : Wrath of the Lich King". Does anyone know a download link/can anyone link a website/can anyone tell me a website? I'm desperate because I'm tired of PvP/PvE and not being able to hang with my old buds. Please help!