Summary

Finally you can repair your parrot feet, and also make it stronger, read the instructions!

Instructions

Disassemble motors and electronics from the feet, cut the remaining feet, flatten and smooth the motor mounts (if you can't see that there was a foot, it's ok).
Fit the printed part and drill like shown in the images.
Do the same for all motor's mounts.
Take 4 cable ties, cut the head of it and block them as you can see in the images.
It's better to tap the plastic behind the tie, then the screw will fit well.
Fix the other side of the tie with duct tape.
Perfect!! Now you are ready to fly again! Yaaaayyyy!!!
Have a cup of tea while your girlfriend reassemble motors and propellers.
UPDATE: the piece in photos is different from the version uploaded, i added a small "weiner like" part to protect motors from highest falls.

Special thanks to:
https://www.facebook.com/DanieleFumagallidesign?ref=ts&fref=ts

Parrot Ar Drone Feet Repair