Per the Coming Soon page, the V5 Distance Sensor and V5 Optical Sensor are now available to purchase from the US VEX Website (Availability varies for international sites). They can be found here:
Unfortunately, there’s been a slight shipping delay for the V5 Rotation Sensor that will cause it to miss its estimated availability of Q3. However, we still expect to receive our stock of those in the next few weeks, and for those to be available by the end of October. The Coming Soon page has been updated to reflect this new ETA.
(And before anyone asks, CAD Files will be added to the product pages shortly)