The light you are describing sounds very much like the Optronics # MCL32RB. It fits all of your parameters at a 4" long and 2" wide gently curved rectangle with rounded corners. If you are in need of just the lens we have that as part # A32RB. We do not have a way to know exactly what brand or model of light you have based off of the year make and model of camper, but it sounds like this is what you have.
Are there any numbers on the base of the light that you can see? A lot of times... view full answer...