Amazon.com: RVGUARD 4 Prong 30 Amp 10 Foot Generator Extension Cord, NEMA L14-30P/L14-30R, 125/250V Up to 7500W 10 Gauge SJTW Generator Cord, ETL Listed : Automotive
20/25ft Generator Extension Power Cord Copper Wire L14-30 30 Amp Power Inlet Box | eBay
Generac 30-Amp 20-Foot split Outlet Portable Backup Power Generator Cord in the Generator Accessories department at Lowes.com
Gen RV 30 Amp Generator Cord, 4-Prong 10 Gauge Heavy Duty L14-30 Generator Power Cord Up to 7,500W - Leisure RV Parts
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
Conntek GIBTT30 30 Amp 125 Volt Power Inlet Box & Power Cord Combo
Amazon.com: Houseables Generator Cord 30 Amp 4 Prong, Generators Extension, 10 Ft, 125-250v, 7500 watt max Rating, UL CUL, NEMA L-14-30P, Rubber, 10 Gauge, Heavy Duty, L14-30, Transfer, Power Cable, Locking :
Reliance Controls PC30100 30-Amp 4-Prong 120/240V Generator Power Cord 100-Foot