Backseat headrest pillow

[Rla]

Hi,

I'm looking for a solution such as these, but that would fit the Model 3 backseat.
https://www.amazon.com/Generation-Headrest-Sleeping-Shoulder-Cushion/dp/B085Q714M1

My boys used to travel in their kid seats, but have outgrown them. So looking for a solution to let them sleep comfortably this summer while we travel by car.

 

[socaliwong]

Tried looking for a head rest as well. The way the Model 3 head rest are there is no option that I've seen. My kids fall asleep on their booster/car seat and they keep leaning forward which is not safe.