amazon.com has the Kreg KBS1000 31-Inch Universal Bench Legs, Set of 4 on sale for $79.99 with free shipping.

• Made from heavy-duty 12-gauge steel
• 600 lb. weight capacity
• Pre-drilled holes allow for additional customization
• Leg levelers and feet allow for 6″ (152mm) height adjustment: 31″ to 39″ (78.7cm to 99.1cm)
• Free under-bench “Storage Solutions” downloadable plan available in each box of legs. 4 legs, 4 leg levelers, 4 adjustable feet, Kreg logo sticker, and assembly hardware