haven't played this far in the current version yet, but i'm curious as well. on an old version someone mentioned finding it after a ridiculous amount of searching through those bins that likely nuked their reputation to absolute zero. i don't think there is anything story related after that point yet and the changelog supports that, but i wonder if you can still theoretically find it that way. anyway, i'd assume sailia will eventually put in a more reasonable way to aquire it. so perhaps hang on to your rep in the meantime.
to copy&paste from an older changelog:
Annice-Event : Day 42 (event can kill Pheli, if she is alive)
Joan-Event: Day 43 (event can kill Pheli, if she is alive)