^^ Pretty much sums it up.
But , if you really want to know.
You have to contact a custom packaging manufacturer, you're not going to find mini cardboard boxes that are conveniently shaped to fit decks.
There also is going to most likely be a minimum you have to buy , because it wouldn't be worth the time if you didn't want a good amount of them.
and that's it , just need some funds and contact a few people