Amazon.com: SURIEEN 1.5FT 30Amp L5-30P Generator Male to L14-30R Transfer Switch Female Generator Plug Adapter Cord, Nema 4 Prong to 3 Prong Generator Transfer Switch Adapter Cord for Generator, STW 10AWG :
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 - - Amazon.com
RVGUARD Plug Adapter 50 Amp Male to 30 Amp Female – 4 Prong RV Camper – rvguard
JSSH Generator Transfer Switch Adapter Cord, TT-30P Male to L14-30R Female, 30 Amp to 4 Prong Generator Plug Adapter, Generator to House Adapter Cord, 30Amp STW 10 AWG - Walmart.com
Rophor Generator Transfer Switch Adapter Cord TT-30P Male to L14-30R Female, 30 Amp 3
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 - Walmart.com
Camco Power Grip Generator Adapter, 30A | Camping World
3-Foot 30-Amp 125/250-Volt Generator Y-Adapter - Champion Power Equipment