Switch plate
thingiverse
I've got a fun one to share, and I'm pretty sure there are plenty more out there like it. This switch should fit into any 20/? T slot with ease. Check out the switch I used: https://www.ebay.com/itm/1x-16A-250V-30A-250V-3-Pin-GREEN-LED-Light-ON-OFF-Rocker-Switch-Car-Truck-RV/321524470837?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Download Model from thingiverse
With this file you will be able to print Switch plate with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Switch plate.