A few years ago I did my first steps in domotica. I started out with KaKu and now I'm up for the next step.... (at least I believe z-wave is the next step

I replaced already a few lights with Hue (Zigbee), but I also want to replace some switches.
For a central ventilation box of Itho with perilex connector I used the KaKu switch ACM-3500-3 (3 way switch).

I created a blockly event (the base for this schema can be found on this forum) and is working pretty good.... except..... it is 433MHz
What is the best way to transform this ACM-3500-3 to a z-wave solution?
Thank you