I am sharing a CAD design for someone who want to print a Light Switch Plate for 3 gang hybrid option 2-1. The plate is for one big toggle switch and two small toggle switches.

For the details see the below:

 <3d printed part>

<Installed on the wall>

 <Front view>

 <Back view>

 <ISO view>

You can download the stl file for 3d printing here.

https://drive.google.com/drive/folders/1Gwn4jNH-e14B5v7UduRJ3eGo9obeO48m?usp=sharing

For design of this file, I have obtained the mechanical dimensions from the sites below:

[1] https://www.doorware.com/site/product.cfm?id=421618

[2] https://diy.stackexchange.com/questions/77960/are-all-rectangular-outlets-switches-and-plates-the-same-dimensions-and-interc