I make these Pinboard after I moved in my first own apartment.
I have used an old cherry keyboard from my old computer.
You can remove the buttons from the keyboard with screwdriver.
Remove the plastic from the bottom with a knife or a gripper.
Then use a hot-melt-gun (I hope this is the right name)fill in some of the hot plastic and put a pin on it. i think you can also use a strong glue.
After cooling you have your first pin finished :D