Are there any closed-eye wearables that resemble the "^_^" face? Like the salted eyedrops but with both eyes resembling the winking eye? I've found myself wanting something like that nearly every time I go to save my HA, so I thought I'd ask.

Unfortunately, no! The best I can suggest is covering the open eye with a mask bit. You can kinda fudge it with the Sui Liners and Eyeshadows, but it looks odd because it's too far up the face.

You can make a thread in the Avatar Suggestion forum if you like; I'd support it. More closed eyes!

The only closed-eye wearables I can think of are the lash and shadow sets, like this:

Unfortunately, they are not quite the shape you are after. :(