Availability of 0,3mm nozzle for M200

With the latest versions of Z-Suite software it has been added support for 0,3mm and 0,6mm nozzles, but where are they sold? How can I buy a 0,3mm nozzle for the M200?

https://www.p3-d.com/products/zortrax-m200-high-lubricity-nozzles

Haven't tried