I didn’t find any z-wave control panel with as much buttons as I wanted so I did it myself.
A PI zero and a membrane keyboard, would work with any matrix keyboard I guess or a HUZZAH ESP8266 that I used in other project even do I not sure about the interrupts there.
If it’s of any’s interests I will upload code and STL files for you. Just comment the topic.
Have fun
/Lasse