Third brake light part #

I’ve had my rig since jan and have only seen a few in the wild. I’ve noticed that my third brake light center is blocked at different angles. I’ve been seeing more raptors lately and the three light are always clear. I posted this in the lighting section a while back and didn’t get any answers. Went to dealership and noticed the 2018 have a different lens. Trying to find a part number to replace mine. It bothers me that much. Anyone? Top pic is 2018.

Better pi