7 Pin To 13 Pin Towing Adapter Socket Plug Copper Core Trailer Adapter 12/24V Converter Mini Socket Converter for TrailerCaravan - AliExpress
Thule Adapter 9906 7 pins to 13 pins
Amazon.com: WESTFALIA Automotive Adaptor 7-pin to 13-pin to Connect 7pin Socket on The Vehicle to 13pin Socket on The Trailer or Bike Carrier : Automotive
Mavis Laven European 13 Pin To American 7 Way Plug Round Connector Trailer Light Electrical Converter,Trailer Connector,EU 13 Pin To US 7 Way Trailer Adapter Connector - Walmart.com
13-to-7 Pin Adaptor - Burquip | Trailer Components & Parts