You can make your own Go set. All you need is a grid board and some counters or other objects to function as stones.
If you are good with wood you can make your own wooden board and ink the lines on top. Card or heavy paper, or any other suitable material, can be used instead of wood, but paper based boards will not be so durable.
Note that on most Go boards the grid is not quite square, with lines spaced in the ratio 22mm to 23.6mm. This is so that it looks square when you play on it.
Do not forget to put a border around the grid, else stones will fall off the edge lines! A typical Japanese Go board measures about 423mm by 455mm.
For stones you can use many things, they do not have to be black and white for example:
Or you can cut circles out of card, plastic or wood.
To make it easier if you are using card, you can print out one of these pages, chosing an appropriate size:
Print using the "Printer-friendly view" link at the bottom and we recommend previewing the print to ensure your set-up can cope with the images at the size selected and suggest printing directly on to A4 card. You could also paste the board and stones on to heavier card, or other material, and then cut them out.
If you require stones and boards of a different size then save the gifs locally and create your own print file. Unfortunately a full size 9x9 board will not fit inside the area printable by most A4 printers. Full sized stones are about 22 mm in diameter.