Hello everybody,

I've been searching my ass off on the internet for an indicator that mounts on the rear carrier of the bike.
In the image you see what is supposed to be the back of a bicycle, the light with indicators is pretty much what i'm looking for, so i'd like some help in finding my product

The only ones i can find are to mount under the saddle
So i suppose you all know what kind of mounting system i'm talking about, the one that screws onto the carrier with a bolt on the left and right.
Thank you very much