take it from the pic that you've done it!
do they look that bad?
yes they are original headrests.
can pick up a couple of screens off the bay for about £120
i ran cables to my dvd player in the glove box.
had to dill the chrome poles that sit in the seats to run cables out of sight as it is one pole that loops through not two.
when rodding through the seat with cables,i went down the inner side as the seats have airbags and wanted to stay as far away as poss.
inside the headrest is a hard plastic inner thats in two halves
the rear half needs to be cut out alot to allow the screen shroud to sit in and secure so that the screens dont stick out.
put the foam back over and cut round the shroud.
put the leather back over and cut out smaller than shroud to allow enough to tuck in so no edges are seen when you pop the screens in.
this is just a brief run through, hope some of it helps,if you decide to go for it and want to know or discuss anything you can pm me and ill send you my number and ring me.
its not as bad as it sounds, the scarey bit is cutting the leather!!!!!
all the best with it mate.