If someone wants to write a patch for it, I will seriously consider adding it. I believe that safely adding 2FA would be very time-consuming, so I'm not willing to do it myself or direct Slickage to do it.
Old posts but relevant.
This is also from a previously-created thread:
https://bitcointalk.org/index.php?topic=1472714.0
Searching for 2FA and finding these posts took me <5 minutes.