The Cam Sensor is a stock Ford Focus ZX3 part. And it bolts right up into the stock location at the right rear of the head. The Ford part number is F5RZ-6B288-A. Ford charged $36.49 for it.
This is one of the sensors that uses the Bosch EV1 connector. $6.50 (with pigtail).
Wiring diagram for the cam sensor. M33 is for signal. M26 is the sensor ground.