Sportsman Series 25 ft. 125V 30A Extension Cord at Tractor Supply Co.
RV Extension Cord - 30 Amp 50 foot A10-3050EH
AC WORKS 10ft NEMA L6-30 Cord 10-ft 10 / 3-Prong Indoor/Outdoor Soow Heavy Duty Locking Extension Cord in the Extension Cords department at Lowes.com
Champion Power Equipment 30-Amp RV Generator 30-ft / 1 3-Prong Outdoor Heavy Duty Locking Extension Cord in the Extension Cords department at Lowes.com
Camco 30 Amp PowerGrip Extension Cord, 25 ft - Fred Meyer
VEVOR RV Power Cord 30 Amp Extension Cords 30 FT Heavy Duty TT-30P Marine Shore Power Cord STW 10AWG/3C, Waterproof for Mobile Homes and Recreational Areas | VEVOR US
VEVOR 50 ft RV Extension Cord, 30 Amp, Heavy Duty STW RV Power Cord, NEMA TT-30R Female NEMA TT-30P Male Plug, with LED Indicator Handle 15A Adapter, for RVs, trams, generators, Campers,
Houseables Generator Extension Cord, Electric Wire, 3 Prong, 30 Amp, 250 Volt, Single, Black, 25 Ft, All Rubber, 10 Gauge, Heavy Duty, L6-30, Commercial, Electrical Power Cable, with Locking Switch - Amazon.com