Summary

Design of the "WayinTop 3pcs PWM Low Voltage Motor Speed Controller"
The potentiometer, circuit board, and max/limiting dimensions are almost exact. Other placements, such as the solder on back side, are estimatess (the height was measured).

I used this for a custom mount. The fit was perfect.

Item appears very similar to potentiometers of other brands. This particular PCB potentiometer can be found at:
https://www.amazon.com/gp/product/B08BJ4WQCV/ref=ask_ql_qh_dp_hza