I am having a hard time finding these sensors for a decent price. Does anyone know of another Infrared light sensor with built in pulse driver circuit and sync detector. I am trying to eliminate the need for using PWM to pulse the IR and I don't want to use a separate timer. I am trying to make the device as compact as possible. Thanks for any info. Also, if there is a sensor that contains the light sensor and ir led in one housing; I would be interested.