Screw Lock Locking Cable End Generator Plug Adapter AC 250V 30A - AliExpress
Amazon.com: Power Converter, L14-30P Twist Lock Generator 220/250V Male Plug to TT14-50R 110/125V RV Travel Trailer Camper Motor Home Female Socket Receptacle Outlet Cable Electric Cord Adapter FX125V864 : Automotive
RVGUARD RV Plug Adapter 30 Amp Male (TT-30P) to 50 Amp Female (14-50R) – rvguard
parkworld Generator 30 Amp Locking 4-Prong L14-30P Plug to 30 Amp 3-Prong L5-30R Outlet Splitter Adapter(NEMA L14-30P to L5-30R) 884913 - The Home Depot
Amazon.com: Parkworld 61810 Adapter Cord 4 Prong Generator Plug L14-30P to 10-50R Electric Stove Receptacle, NEMA L14-30 Generator Male to NEMA 10-50R Electric Stove Female, 30A 250V 7500W, 1FT : Electronics
Westinghouse Outdoor Power Equipment 501138A Generator Plug Adapter, 6-50P to 14-50R - Walmart.com
Amazon.com: Rophor Generator Transfer Switch Adapter Cord TT-30P Male to L14-30R Female, 30 Amp 3 Prong to 4 Prong Generator Plug Adapter, RV Generator Plug to Inlet Box, 1.5FT : Patio, Lawn