Some toggle switches come with them.
I don't suggest this switch is suitable for your application, just an eg.
No idea where you can get them for rotary-type items if that's what you have.
Pic. of YOUR switch would help.
When I was at work ages ago some had an engraved plastic thing ( sort of black/white sandwich, can't remember the name of the stuff, gravelux ?? )
EDIT Traffolyte
http://cpc.farnell.com/pro-power/ppw01085/switch-toggle-spst-3a-leaded/dp/SW03242
Edited By Dave Daniels on 01/09/2017 15:35:57
Edited By Dave Daniels on 01/09/2017 15:39:17
Edited By Dave Daniels on 01/09/2017 15:40:38