PX4 digital airspeed sensor

Where can I purchase the PX4 digital airspeed sensor? The old analog sensor is the only one that I have found. pixhawk.ethz.ch/px4/modules/px4airspeed


Is it identical / compatible with the EagleTree Systems I2C Airspeed sensor.?
(I think I read somewhere around that ET digital sensor is supported by PX4.)


I would like to order a PixHawk and digital sensor at the same time – I just wanted to know when I would be able to order?