Tripp Lite Heavy-Duty Power Extension Cord with 20 AMP Breaker, 20A, 10AWG (NEMA L5-30P to NEMA L5-20R) 2-ft.(P043-002): Amazon.co.uk: Electronics & Photo
Tripp Lite Power Extension Cord, C19 to C20 - Heavy-Duty, 20A, 250V, 12 AWG, 6 ft. (1.83 m), Black - Critical Power Supplies
Power Extension Cord/Splitter, NEMA L6-20p to 2X NEMA L6-20r Y Splitter, Heavy Duty - 20A, 250V, 10 AWG - China Y Splitter AC Power Cord, IEC 320 C14 Male Plug to 2xc13 Female Splitter | Made-in-China.com
Utilitech 9-ft 12/3-Prong Indoor Spt-3 Heavy Duty General Extension Cord in the Extension Cords department at Lowes.com