As the title states the wagons switch is gone as far as I can tell and from what it looks the previous owner had some metal chomping alligator gnaw at it. Any way, when turning the key I don't get the pleasant click at each of the positions. I popped the cover off and fiddled around with it and the tumbler tumbled out. A rocker and pin fell out with it and I've no idea how this occurred. I drove it to work and now I sit in the parking lot confused. Help!

I think I got it. I think.

On a lot of cars if the tumbler comes out you can usually turn whats behind the tumbler with a tool of some sort. Usually a screw driver