Perhaps you should pin down a few more details before people can give a good answer. Such as, are you looking for a gaming screen to take to LAN parties or one to connect in your car for movie playback, etc. Also, preferred size range and budget would help.
SparkFun.com has PSP screens. Really need more info, PS1 screen, laptop screen, I have an LCD screen in my Borg 1 of 1 that was from a portable VCP for in a bag for my Jeep Grand Cherokee Limited. "Are we there yet daddy?" John