Here is a few tips to find them easier:
1- use smart bone action that control switch layer:
This is standard method but needs to set up Smart bone for it. This will take a little time but saves you nerves! you can easily find tutorial about it. Just Google it .
2-use filter on layer window
At top of layers widow is a drawer menu that is " name contains" by default ( or may be "no filter" may). Change it to "kind contains" and type to the next box" sw". Now the list is filtered and only shows switch layers
3- take out switch of the character layers:
This is not usual way but you can reference switch layer and then take out the original layer out of character layer and put it in sme folder like switches. Then hide this layer because it will not move with character bones and stays still on the screen. If you switch this layer the duplicate in the character layer will also do the same.
4- and a method that is similar to face rotation set-up that I will send a video soon. Wait for that.