Amazon.com: Maso Trailer Socket Converter 12V 13pin Towing Socket Caravan Trailer Electrics Plug Adapter Suitable for European Standard Trailer Engineering Plastic housing Black : Automotive
Car Parts 13 Pin To Dual 7 Pin European Standard Trailer Socket Plug Connector Electric Adapter Towbar Towing Socket for Caravan|Trailer Couplings & Accessories| - AliExpress
7 To 13 Pin Adapter Trailer Socket Connector 12v Caravan Truck Towbar Towing Electrical Converter N Type Plastic - Cables, Adapters & Sockets - AliExpress
Socket 13-pin Jaeger type with micro switch in blister - PAT Europe