Well here I am again, I hope that this one hasn't been posted beforehand?? I'm sure I'll be told if it has?! These are 8 inch not 7inch ones. I have a couple of these and they are a god send whilst on a long run in the car. Available in store and to buy online.
Wharfdale WDM-6988 8 inch Twin Screen In Car DVD System - Argos £74.99 Half Price!