Office Depot / Office Max has the APC Desk Mount U-Shaped 6-Outlet & 4 USB Surge Protector (PE6U4W) for $16.99 with free shipping.

Also available at amazon.com

• Desk clamp power station for under desk power, or mount over a cubicle wall (upto 2.4 inch thick)
• 6 outlet surge protector power strip
• 4 USB charging ports provide 4.8A of total charging power