Alpha Dual-Gang 16mm Right-angle PC Mount - 10K Audio [RV16A01F-41-15R1-A10K-30H4] : ID 5272 : $2.75 : Adafruit Industries, Unique & fun DIY electronics and kits
BOJACK 10K Ohm Breadboard Trim Potentiometer with Knob for Arduino P103 3 Terminal pin Blue Variable Resistors (Pack of 10 Pcs): Amazon.com: Industrial & Scientific