Electes 20 Feet Heavy Duty Extension Cord/Wire, Multi 3 Outlet, 3 Prong Grounded, Angled Flat Plug, 16/3, SPT3, UL Listed, White - Amazon.com
USW 12/3 Twist to Lock Multi Outlet Adapter 3-ft 12 / 3-Prong Indoor/Outdoor Sjtw Heavy Duty General Extension Cord in the Extension Cords department at Lowes.com
Insignia™ 10' 3-Outlet Extension Power Cord Black NS-HW308 - Best Buy