Where to find build and/or atlas-0 files for certain player character animations?

[EuedeAdodooedoe 1187]

I believe I asked this before once when creating an animation, although I've forgotten stuff about this now. Say I wanted to extract player_idles animations so that I could open up certain player character animations in Spriter. The file contains only an anim file. Where exactly would I find the build and atlas-0 for this file? I've tried to take two other build and atlas-0 files from player_actions and player_hit_darkness, but I didn't get the necessary textures for the specific animation.

[Lumina 2150]

You take the atlas and build file of the character you want ? Like using willow or wendy or i don't know which character file, no ?