Amazon.com: YONHAN 4 Pin to 7 Pin Adapter Trailer Light Adapter 4-Way Flat Truck to 7-Way Blade Reverse Plug Connector with Mounting Bracket for Towing Solutions : Automotive
Trailer Light Electrical Adapter | StowAway
7 Way Rv Blade To 6-Round Adapter | Agri Supply
Flat 4 Pin Truck to 7 Way Round RV Blade Adapter Trailer Plug + Mounting Bracket | eBay
Amazon.com: MICTUNING 4-Way Flat to 7-Way Round Blade Trailer Adapter Wiring Plug Connector with Mounting Bracket : Automotive
Amazon.com: OPT7 7 Pin to 4 Pin Trailer Adapter with Secure Tab, 7 Way Blade to 4 Way Flat Trailer Light Adapter, Connector for Trailer Tow Hitch and Redline LED Tailgate Light Bar : Automotive
Reese Adapter 7 Way Round to 4 Way Flat in the Trailer Parts & Accessories department at Lowes.com