Okay, that's a hot poster.
Anyway, go to Home Depot and buy the thinnest acrylic they have. It doesn't have to be Lexan or Plexi or anything fancy -- the cheap stuff will do nicely. I'm pretty sure you can get 60" pieces. I honestly can't remember. If you can indeed buy 60" pieces, get a sheet, and get them to cut it down for you.
Then, go to a craft store (Michael's, Hobby Lobby, Garden Ridge) and buy a pair of 60" frame pieces and a pair of 36". They'll come with all the hardware you need. You might need to buy a wire seperately, or maybe you have some at home. You're also going to need some foam backing for the frame, which you're probably going to have to buy in two pieces, since I don't think most places sell it at 60".