This a rework of the Toggle Switch cover found on here. The files come from http://sallyengineering.weebly.com/
I added in a angled block to allow for when the cover is closed it will flip the switch.
Printed with 100% fill and .1 mm layers.
In the pictures the left one is from the SallyEngineering STL.
The one on the right is the rework.
The switch is a 12VDC 25 amp on/off.
Would recommend actuator length less then 17.8mm.
Something like Digikey # 1091-1026-ND will work.