USB Type C 3.1 PD to 5.5mm Barrel Jack Cable - 12V 5A Output [1.2m long with E-Mark] : ID 5450 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: (2-Pack) JacobsParts 12V USB C Type-C PD Trigger 3ft 5A Power Cable 5.5 x 2.1mm DC Connector : Electronics