After a crash, lots of audiobooks have somehow moved to Music folder, and links are broken - how can I fix this?

Question

Wow, I'm surprised the forums accepted that long a title.
Anyway, the computer crashed. I started again, and when opening iTunes after the crash ... something happened. There was a prompt that I idiotically didn't write down (Moving Library? Updating Library?), that kept going for hours, and eventually I just gave up and shut it down. That was probably stupid. Also evidence of significant things happening: the next Time Machine backup was 60GB+, so something big had changed.
As best I can tell, lots of my Audiobooks (and I've got MANY) now have broken links - when I look in the "iTunes Media" folder, many of the files that were once in the "Audiobooks" folder are now in the "Music" folder instead. All are still in the same subfolder as before: so audiobook files that were in "Audiobooks / BBC Melvyn Bragg" are now in "Music / BBC Melvyn Bragg", for example. So far I've only found Audiobooks that have been messed up in this way. Music and iTunes U and Podcasts seem to be unchanged, but maybe I just haven't noticed those problems yet.
And obviously I want to fix this.
Note that my iTunes library is set to "Keep iTunes Music Folder organized". All of the organization is what iTunes has done.
Option 1: can I just restore from a Time Machine backup? If so, what should I restore? There have been a few changes in the metadata in the 3-4 days since the crash, but I'm not overly concerned with that.
Option 2: can I just use Finder and move the files back? This would seem the "easiest" option to me. Although lots (hundreds? thousands?) of audiobook files have been moved, they're within only a couple of dozen different folders. Dragging them back into the correct folder would be easy - but what kind of havoc would that wreak on the database system?
Option 3: go through each track and find the file. I can do this. It'll take hours and hours and hours. I don't want to do this.
Slightly different question: how can I make a smart playlist of all the files with broken links? (I'm still trying to get a handle on just how big this problem is.) I've found suggestions about (1) making a smart playlist of everything, (2) dragging all of those into a normal playlist, and (3) making a new smart playlist of whatever's in #1 but not in #2, but that doesn't seem to be working for this situation. Is that advice now outdated, or is there something unique to my situation?
Thanks in advance!

Answer 1

Following up: I went with Option 2 above, and it seems to have worked quite well. I didn't even need to quit iTunes. After the files were moved, the exclamation marks remained at first, until I played the file, or restarted iTunes - now all seems well, until the next crash anyway.