Amazon.com: CQRobot 100 Pieces Black Standard Computer Jumper Caps with Handle Pin Shunt Short Circuit 2-Pin Connector 2.54mm. for Arduino Raspberry Pi PCB PC DVD HDD Motherboard Shorting and Other Project. :
2.54mm 0.1 Pitch 12-pin Jumper Cable - 20cm long : ID 4942 : $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits