Headrest Monitors Installation like this?

I've seen detailed instructions on the web somewhere for doing exactly what you want to do.  I couldn't find them, but they are out there if you want to look.

No need altering the bezel.  Basically, you go about the installation as you normally would.  Create a template using the bezel, trace the outline onto the headrests where you want the monitor to be placed, cut the traditional "X" 1/4 inch short from the edges of the outline. When cutting out the foam, you cut to fit the bezel and not the screen.  Be sure not to cut too much foam out.  When you think you've got it, secure the bezel to a metal plate or similar.  Cut off the pointy edges of the leather remaining from the "X" cut leaving about 1 inch of material from the edge.  Then pull that leather tightly into the bezel, using glue to secure it into the bezel.  Then snap your monitor into place.  Your bezel will be hidden and your monitor will be the only thing showing.  The only problem I can forsee with this method is that the leather being folded and glued into the bezel will obscure any type of clip used to secure the monitor into the bezel.  You may have to cut out those areas from the leather using an exacto knife after gluing the leather in so that your monitor can "clip" into the bezel and be secured.

This is the best that I can remember.  If I find the link for those instructions I mentioned, I'll be sure to post it up.