https://www.sparkfun.com/trimpot-10k-ohm-with-knob.html
There are lots of trimpots out there. Some are very large, some so small they require a screwdriver. Here at SparkFun, we just needed a simple one that worked....
sparkfun electronicstrimpotohmknob
https://www.bochen-resistor.com/
Sichuan Bochen Guosheng Intelligent Technology is a national high-tech enterprise focusing on the research, development, and service of potentiometer resistors.
compositeresistorpresettrimpotpotentiometer