Needle nosed pliers should do the trick.
The black plastic actually broke, and I can't fit a new stabilizer under the plate without desoldering. So I have a long night ahead of me.
EDIT: I actually tested to see if I thought I was going to notice the difference on the key in question, and I couldn't, so I am just going to run my "Enter" with no stabilizer. I think it's the easiest, albeit sketchiest, option.
![tongue :p](https://cdn.geekhack.org/Smileys/solosmileys/tongue.gif)