Krat Central Station is the best area for this.

Source: https://screenrant.com/lies-p-best-location-farm-ergo/

Past this puppet is the Special Krat Supply Box you can collect.

Source: https://www.digitaltrends.com/gaming/unlock-hermit-cave-lies-of-p/

This material is incredibly rare, found only in secret areas and hidden locations scattered throughout the massive regions of Krat.

Source: https://screenrant.com/lies-p-how-to-upgrade-p-organ/

This object can be found all over Krat.

Source: https://gamerant.com/lies-of-p-how-to-remove-status-ailments/

"You are awakened by a mysterious voice that guides you through the plagued city of Krat – a once lively place that has been poisoned by madness and bloodlust.

Source: https://comicbook.com/gaming/news/xbox-game-pass-gamepass-games-new-lies-of-p/