The closest lid we have to a clear lid is the Replacement Dome Assembly for Ventline Ventadome Trailer Roof Vent # BVD0449-A03 which is a translucent smoke color.
This lid is a direct replacement for the Ventline Ventadome Trailer Roof Vent # V2092SP-29 so if this is what you have, it'll work great.
If you're looking for something else, feel free to come back with a bit more info or maybe some pictures and I'd be happy to help. view full answer...