Printers. I was taking a printer apart mostly for the motors and I realized that the scanner in it had a glass surface and when I got it out, it was exactly the thickness of my current piece of glass. I think it was even borosilicate too becausr the edges were green. Only thing I’m not sure of is the dangers of cutting this kind of glass or if its possible.Edit:forgot to mention, the printer i got this from was one of those really common white hp photo all in ones that you always see in thrift shops. Already threw the rest out so cant get a model number but you can get a lot of free printers on craigslist http://ift.tt/2aPW3h4