Ok, memory from 3 years ago was wrong. I bought 2 kits on amazon and a bunch of buttons and wires on aliexpress.

Hers the Amazon link: https://www.amazon.com/dp/B01N4OLU72/ref=cm_sw_r_cp_apa_fabc_8WMA2DY8ECZ3488DR30W?_encoding=UTF8&psc=1