I'm currently planning a build for a 20x20 or possibly a 20x24 wet plate camera. I would like to acquire a lens before I go to far forward with the planning/ building of the camera. I have an idea of the type/size (900+mm, 30-35") of lens I'm am looking for but ebay is worthless. Can anyone point me in the direction of a good source of vintage lens or used lens. Maybe have one collecting dust from a project that never got off the ground and want to unload. I am also open to specific recommendations on lenses, I've shot a lot on 4x5 so this is a leap into a whole new world.

Thanks for helping out in advance.