I bring my computer to work everyday and there are some people who touch the screen when pointing out something. I would like to buy a screen protector if there is a such a thing for the late 2008 model MBP. Does anyone sell a precut one that I can just slap over my screen? Prefer something that doesn't leave any residue on my screen incase I need to take it off one day. If something like this does exist please let me know. Thanks!