AC WORKS 1ft NEMA 5-15P to NEMA 5-20R 15-Amp 3-wire Grounding Single To Single Black Basic Flexible Adapter in the Adapters & Splitters department at Lowes.com
Straight Blade Plug,15 Amp 120-125 Volt, 2Pole 3Wire, Plug, Male Extension Cord Replacement Electrical Plugs End (Black-4pack) - Amazon.com
Extension Cord Ends Male and Female Replacement Plug & Connector Set,
15Amp 125V AC Port Plug with Heavy Duty Integrated Dual 20" Extension
Hubbell HBL8215C 15 Amp 125 Volt 2-Pole 3-Wire NEMA 5-15P Black and White Straight Blade Plug | Cooper Electric
Amazon.com: stio 15 Amp AC Port Plug, 125 Volt AC Power Inlet Socket with 16 Inch Extension Cord and Watertight Cap, Waterproof Integrated Outdoor Electrical Outlet Receptacle Box for RV,Boat,Pickup,Jeep,Truck : Automotive
UL Listed NEMA 5-15P Extension Cord Repair Ends Replacement Male Plug Cord Cap 15 Amp 110 120 125 Volt 3 Prong 2 Pole 3 Wire Straight Blade Commercial Grade 2-Pack - Amazon.com
Extension Cord Ends Male and Female Replacement Plug & Connector Set,