ATX PC Computer Motherboard Switch On/Off/Reset Power Cable 2Pcs - Walmart.com
STEMMA Wired Tactile Push-Button Pack - 5 Color Pack : ID 4431 : $7.50 : Adafruit Industries, Unique & fun DIY electronics and kits
Push Button cable with safety connector
Amazon.com: DKE Power Supply Control Adapter Cable 2M External PC Power Button ATX Desktop Computer Case Motherboard Switch On Off Power SW Cables, Black : Electronics
39"(1000mm) 5.2 Bowden Wire Release System with Push Button and Release Heads - Bansbach Easylift