Delta-B PCB panels
Here are some PCB panels that you can use with PCB services like DirtyPCBs - the services that allow panelization will give you the best bang for the buck, however, if you use something like JLCPCB, it might be more beneficial to order the PCBs separately.
"Front, back and spacer" panel
"18650, keypad and speaker adapter" panel
"18650, keypad and speaker adapter + mods" panel