My current face is a little sad, it definitely could be sadder but I have + - I kind of like these as neutral lips since I haven't found much for frowny mouths in general

There's also:

I don't know much for scared offhand though, with a different mouth the eyebrows/loose eye could probably work though

not much, but maybe these will help? :>

it has white around the eyes but I always use it for scared avatars.

edit: +recolors have always looked kinda sad to me, because of the shape of the eyes.

Something about and the recolors looks sad to me. These might also work?

These items may help:

I've used the Dark Shaman Shriveled Fruit to make a crying HA before.