Modeling and 3D printing a replacement porch light body for our van

A few months ago, I noticed that the passenger side exterior porch light on our Winnebago Solis 59P camper van was starting to peel and lift away from the van body at the leading edge. Unfortunately I didn't take a great picture, but the separation is circled here. If you have this problem, you could probably just use some non-silicone sealant like Lexel to seal the gap, rather than taking the…