Not really needed - NE Druids are quite viable, and most Druid PrC's don't add alignment restrictions. There's the Blighter from Complete Divine, but it's... not worthwhile, and seems to be more intended as a flavorful adversary for a nature-friendly party than it is a PC PrC.
Blighter it is, like the flavor, where can I find this class on line? DD wiki but who knows if thats legit info or that made up wiki poop!