Hi,
I had exactly the same problem building my saber from scratch in that I could not find a switch for it. If the wires are still okay and they have just pulled off the switch then it is quite possible that you will be able to re-wire the ones you already have (sorry can't see the pictures so only guessing the condition). You may also be able to take it to a tech store which may be able to re-wire it for you. Hope you manage to find a solution :)
Sky