The A/C on my '82 (RQB 3420) died. I traced the problem down to a broken A/C fan speed controller rheostat switch - the one with "AIR" on the knob, located on the vertical console panel. The switch is of ceramic construction, about 1 3/4 inches diameter, and has spade lug connectors for 2 wires on the back. Does anyone know where I can get a replacement, or what will interchange with this switch? Ray