Pixhawk 3 Pro out of stock

Hi there,

We plan to purchase the Pixhawk 3 pro together with the Sirus F9P receiver. But I noticed Pixhawk 3 Pro is out of stock from the official website. I’m not sure does that mean Pixhawk 4 will be released soon ?
May I know when it will be available to order ?
Also how long it takes for the products to be shipped to Australia Sydney ?