The joysticks for The Grid appear to be unobtainable. They seem like a custom joystick designed for the game. However, the circuitry that reads the positioning is a standard Midway 49-way joystick. These are commonly available in NFL Blitz cabinets. You can disassemble a NFL Blitz joystick and use the circuit board as well as several of the plastic pieces to repair a Grid joystick.