I agree a new switch is in order, and its childs play to change. its easier to get the switch off if both the steering wheel's plastic covers are off but I took the switch off with just the top cover removed.
I suggest you trudge around your local salvage yard for contours, we got a replacement switch in perfect condition execpt for the white paint faded, its worked perfectly we got it for $10 And i bet you could get it for less if you tried and i had it on my tour in about 20 sec's once i had the cover off . the Salvage yard should let you try it out to see if it works ok.. I was tempted to buy the three we grab just encase it broke again.
its also a great place to pick up some other things from the wrecked contours.
Good luck
J. Grover