Frame is made using Black PLA+ from eSun or White PLA from Prusa while joystick is Protopasta conductive PLA. Have used them for many hours by now and they work great, in games with smooth locomotion it's quite an improvement. Only issue is when the joystick slides off on the bottom side of the touchpad but it's only a small issue.
eSun & Prusa PLA+ & PLA
Black & White