16mm Panel Mount Momentary Pushbutton - Burgundy : ID 1503 : $0.95 : Adafruit Industries, Unique & fun DIY electronics and kits
620/631 Series Pushbuttons | Schlage System Accessories
Illuminated Short Profile 22mm Pushbutton Maintained / Momentary [SW15] - $11.98 : Auber Instruments, Inc., Temperature control solutions for home and industry