assembly

I have a sloppy tiller assembly to my rudder post. Dose anyone know where I might find a new/used one? Gerry

I have owned my E28 for about two years and sail in the San Diego area. Just recently I noticed what appears to be galvanic corrosion forming on the shaft packing area just inside the hull. I do not see any evidence of zincs anywhere in the area, and nothing in the owner's manual mentions...