Ditto on Ford 3 - get the kit from New Port Engineering.
However, you might want to try this first. Disconnect the rubber hose in the engine compartment that goes to the wiper motor. Fill a can or jar with some Dot 3 brake fluid. Stick the hose into the jar of fluid and manually operate the wipers back and forth about ten times (get a helper to work the other side). The fluid should suck up into the wiper motor. Let it sit overnight and then try the wipers. If its just the "paddle" on the inside of the motor, this might fix it. Put a rag down on the carpet under the motor to catch any drips. When you start the car, it may smoke some but will clear up.
If this doesn't fix it, go with the electrics.