This is the button for my single 18650 Squonk Mod.
The Frame for the mod can be found here:
Squonk Mod Frame
The Front and Back Panels can either be 3D printed as well:
Front and Back Panel for Squonk Mod
Or you can get the .dxf file from my website:
www.modern-crafts.net and cut them out of 3mm (1/8") thick wood or acrylic.