AC WORKS 15ft NEMA 14-50P to CS6364 15-ft 6 / 4-Prong Indoor/Outdoor Stw Heavy Duty Appliance Extension Cord in the Extension Cords department at Lowes.com
VEVOR 15 Feet RV Power Cord, 50 Amp, Heavy Duty STW 6/3 + 8/1 Generator Cord, NEMA 14-50P Male NEMA SS2-50R Female Plug, with LED Indicator Handle 15A Adapter, for RVs, ETL Listed - Yahoo Shopping
50 amp RV Power Extension Cord with LED Power indictor - 50 Amp Male to 50 Amp Female Standard Plug 30 Foot