Chunk hoppers/chests through gameplay?

[illuminatiguyNL]

I recently looked at the patch notes (survival reset announcement) and saw that the chunk hoppers (and chunk chests?) Are attainable through gameplay.

I've looked through many systems, asked a couple of players and looked at the updated survival guide but i cannot find anything about getting them both through gameplay.

And i have not seen anything about chunk chests either.

Are the chunk hoppers only attainable through purchasing them with gold and trading or also gameplay, and if so how?