When I bought my Nex-5 (used) it came eqquiped with an original Sony hard plastic screen protector. It was very scratched so I went to Sony to buy a replacement. They told me that they no longer carry those and offered me a semi-hard plastic/vinyl one (original Sony NEX-5N accessory but it fits the NEX-5 perfectly). I'm very pleased with my purchase.
edit: part # is PCK-LM1EA