Retronebbia for LP5000S

I am in need of a rear red fog light for my 82 Countach. A few are available, but despite every seller’s claim that they are the correct one for my car, they all appear slightly different.

Does anyone have a photo of the back of the rear single red Carello fog light? I am looking to see how it mounts on the bracket. (I need a bracket too, but can get one fabricated if none can be found).

Greetings to all.