This is a ghetto fabulous invention. It's not like you ever see a Rolls Royce with something like car blinds on it. It's always the beat up Honda with fake air vents that has something as audacious as car blinds. Isn't this why they created window tinting? So you wouldn't have to endanger yourself with blinds flapping around. I wonder if they are also on the windshield. "Honey, can you close the blinds?" / "yeah, but you won't be able to see and we'll die." / "I said close the blinds."
I'm a big fan of these ghetto contraptions. You can find a ton of stuff like this in any auto parts store. There's always a specific section for stupid things like skull shifter knobs and mirror LED lights. I used to load my old Acura up with all of that cheap crap.