I'm hoping someone with some lens experience can assist me in finding a novel lens that I read about some years ago. The lens produced a fisheye image along one axis and a narrower field of view along the other axis of the lens. This is a technical application and I'm not much concerned with image distortion since I will be filtering the image along the edges. The application is to monitor a narrow swath of the sky from a few degrees above the horizon on either side.

Thanks very much for any assistance you can provide.