CURT Electrical Adapter (6-Way Round Vehicle to 4-Way Flat Trailer) 57620 - The Home Depot
CXTM 7 RV Blade to 6 Pole Round, 6 Way to 7 Way Adapter 7-Way Blade to 6-Way Round Trailer Adapter 7 pin to 6 pin Trailer Wiring Plug Adapter - Yahoo Shopping
REESE Towpower Wiring Adapter, 7-Way to 6-Pin & 4-Way Flat, w/ LED Tester - Jefferson City, TN - Leeper Hardware
Amazon.com: NEWSUN® 4 Way Flat to 6 Way Round Connector Vehicle Side Trailer Light Pre-Wired Adapter 12" Harness with Mounting Bracket, with Anti-Dust Cover, Water-Proof for Trailer, Truck, GM Pick-up,Hauler : Automotive
HOPKINS 47155 4 Wire Flat Adapter – Parts Universe
Amazon.com: CARROFIX 4 Way Flat to 6 Pole Round Trailer Wiring Adapter Quick-Connect 6 Way Connector with Mounting Bracket : Automotive
CURT 6-Way Round To 4-Way Flat Electrical Adapter
Trailer Light Adapter Plug 6 Round to Flat 4 pin - The Trailer Shoppe