I wanted something like dendad51's adapter (https://www.thingiverse.com/thing:1372158) but I wanted it to mount on top of a faceplate and completely cover the decora cutout.
Designed for 6-32 screws and captured nuts. You may need supports for the nut pockets depending on how well your printer does overhangs. I printed mine with hatchbox PETG and it's stupidly overbuilt.
Fusion 360 archives and STL file included for all versions, good luck and have fun.
v2: https://www.thingiverse.com/make:551638
v1: https://www.thingiverse.com/make:551257
The author marked this model as their own original creation. Imported from Thingiverse.