Skull podium topper is made out of 10mm coro
It has 5 1" holes for push buttons (or order without holes for custom spacing)
It is 16" wide by 18" tall
Link to push Buttons.
https://www.amazon.com/dp/B01MSNXLN0?ref_=cm_sw_r_cp_ud_dp_1FAVP9BZ0HRZA1GF2BT1
EG STARTS 5X Arcade Buttons 60mm Dome 2.36 inch LED Push Button with Micro Switch for Arcade Machine Video Games Console
Link to controller
Raspberry Pi Input Extender Kit: Pi Hat + Node (experiencelights.com)
Plans for what I used to build are in pics below.