A fan-created non-canon one, obviously, but I made one nonetheless.
Last December I wrote a Night Vale fan fiction. You can read it here, or here, or here, or here. It didn't get an overwhelming response or anything, but some people seemed to like it. Clearly, since I'm a crazy person, the next logical step was to adapt it into a full-length episode.
You can go listen to it, or download it, or whatever else you'd like to do with it (I'm not sure what else you could do with it though, honestly) now. I hope people like it!