You could try setting a few keybinds.
Exiting out of the game.
Backing up your WTF folder.

Then changing a few more.
And repeating the process.
And then loading the first WTF folder.
And seeing if keybinds are stored there.

I know all of the UI Elements are stored that way.
Not sure on keybinds.
If they're server side, then this won't help you.
If they're part of the WTF, you could paste the correct folder and then launch Wow.