That makes it easy... a few more questions:
Do you know if the circuit breaker is still there? How 'bout the resistor? (It's brown, about 3/4" dia. x 5" long with 1 wire coming out of each end, would be on the firewall either in the cab or under hood)
The hook-up is pretty simple - the hot wire from the circuit breaker goes to the center of the toggle switch. The two wires from the resistor connect one each to the other two connections on the switch. The wire to the blower motor connects to one of the same terminals on the switch that the resistor connects to - it doesn't matter which, but the one that the blower motor wire is connected to will be "HI".
The switch itself is standard hardware store fare - it has simple screw terminals (3-position, center off). In fact, I saw an identical switch at my local mom & pop hardware store, it was even made in USA, none of that China crap. The bracket is a simple L with a hole in it, I can get the dimensions off mine if you want to make one yourself.
Saturn has circuit breakers and the "HI-OFF-LO" data plate, your local hardware store should have the switch, and the resistor and bracket could come from a bone yard. It's the same stuff as a deuce. Or I can pull it all for you when I go to Barstow...
Regards,
Jon