dunno if its been posted or not but you can get a free sample pack of transparencies for making screen protectors. i read that the laser printer types are the best but i havent tried it out yet.
http://209.46.8.189/gage/threem/form3m.html
or try this if the first one doesnt work
http://www.3m.com/us/office/meetings...mplepack.jhtml