Well, apparently there are tons of "squares" betting on here already. All you have to do is like Philly or Pitt today. LOL
Sorry bro, you may just have to make one yourself, I know some guys that draw em up.
Get some graphing paper from staples... White paper, blue grid lines..
Get a ruler and use a pen/pencil to trace a large square either 20 x 20, 30 x 30, or 40x40 squares in size. Then, depending on the size every 2, 3, or 4 squares, draw a lines until you complete the grid. XEROX it, and the blue lines will disappear.