Small Camper windows

Hello, Ive been trying to look for fixed camper/rv windows.
Im looking for a 20cm x 40cm window. The reasoning for such a small window is to prevent the ability to break in.

Does anyone know where to find something like this?
Prefferably EU.

I’d try any rv or motorhome salvage yard first. I have found much of what i need there. Good luck and clever security measure!

Don’t forget to look at windows for boats. They come in a lot of sizes, some very small, and usually have screen available. Also, eTrailer is a good resource.