AC WORKS 25ft Super-Duty L5-30 Cord 25-ft 8 / 3-Prong Indoor/Outdoor Soow Super Heavy Duty Locking Extension Cord in the Extension Cords department at Lowes.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
20 Amp NEMA TT-30P to L5-30R Power Extension Cord Adapter - Twist Lock – GearIT
Amazon.com: ONETAK NEMA L6-30P to 6-50R 240V 30 Amp Twist Lock 3 Prong Male Plug to 50 Amp 3 Prong Female Outlet Receptacle Generator Welder Dryer EV Charger Power Cord Adapter : Electronics