I am looking for a metal pet barrier that would go directly behind the driver and passenger seat. I am however reluctant to get one though because I don't want to mess up the ceiling of my car. Anyone have any insight into a really nice effective pet barrier?

Maybe if you have pictures too that would be really awesome. :-)

Lookie lookie here:
http://www.elementownersclub.com/forums/showthread.php?t=20005

or here:

http://www.elementownersclub.com/forums/showthread.php?t=10480