This was designed to be a replica of a camera housing that is very popular in the security surveillance community. This housing was made with a slot that you can slide in a thin piece of glass or clear plastic of whatever shade or color you want. You should be able to resize to your needs. There are 4 holes for rivets or screws.

I included a base that your camera can be mounted to along with a hole for the cables, a hole for screwing to the roof, and an arc hole to allow for better positioning.

Feel free to offer suggestions for edits.