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
Westinghouse 30 Amp 120-Volt L5-30P to TT-30R Generator Plug Adapter 30154A - The Home Depot
Reliance Generator Adapter Plug to Convert L5-30 to RV, Model# AP31RV | Northern Tool
TT30 P male to L14-30 R female RV to Generator Adapter, twist lock, 120 voltage adapter | GenInterlock