Are you wanting it to make your own tofu, or to squeeze out the water of store bought tofu?
If the latter, I made a simple press with two chopping boards and 4 coach screws with appropriate sized wing nuts (stainless steel)
My sister makes her own tofu with a press like this:
Tofu fabric: cotton. Tofu machine mold material: food grade PP. Tofu is comfortable and soft, including reusable cheese cloth. Gauze is breathable, soft and absorbent. Size: Box: 14 11 9.5cm, cloth: 40 40cm.
www.ebay.com.au
You'll need to use cheese cloth with it.