My son has a 1978 Dodge Magnum. His wipers are not working. I took a brief look, and found the arm that connects to the motor was not connected. When I looked at the backside of the wiper motor, there is just a shaft, nothing to connect the arm to. I did find pieces of what the Dodge parts guy thought was a pivot linkage (tan colored cup shaped piece). Parts counter guy said "Good Luck". Where can I find the parts necessary to fix his wipers before the snow comes? Thank you in advance for ANY tips.