90 Sentra tail light sensor

[beardRage]

I need to replace the little green box connected to my tail lights, but I can't find this part anywhere. It's like it doesn't even exist. Nissan parts zone shows it in a diagram but doesn't list it. That's the only place that even hints that it exists. I've tried searching the numbers on it, but no luck. I've even taken it to several auto parts places (advance, auto zone, o'reilly's) and came up empty. Anybody have any leads on this? I don't like having to run a wire to my cigarette lighter to get the lights to work.