Superior Electric YGA026 Twist Lock Electrical Plug - 3P 15A 125V, NEMA L5-15P
3-Prong 15A to Twist-Lock 50A RV Power Adapter 1.5 Feet (NEMA 5-15P to SS2-50R)
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
MaxWorks 80843 25 Ft. 30 Amp 3-Prong Male Twist Lock to 15 Amp Female Triple Outlet Generator Extension Adapter - Walmart.com
L5-30P Twist Lock Male 3-Pin Plug To 5-15R 3-Prong Female Receptacle Outlet NEMA Electric Power Cord Adapter/Converter 110/125V input 110/125V Output - Amazon.com
Gen RV 30 Amp Generator Cord, 3-Prong 10 Gauge Heavy Duty L5-30 Male Generator Power Cord Up to 3750W - Leisure RV Parts