I bought mine off eBay a long time ago, but they're basically the same as these: https://www.amazon.com/Joystick-Potentiometer-JH-D300X-R3-220%C2%B0ohm-Thermistor/dp/B07CVGPMDP/ref=sr_1_4?crid=RZBGI4O5OIPU&keywords=joystick+potentiometer&qid=1583514639&sprefix=potentiometer+j%2Caps%2C160&sr=8-4