Originally Posted by
maortega15
Do you happen to know the specific shop? I don't want to be running around the airport for hours and hours

It's a shame how I fly in and out of HKG on a regular basis, but have no clue where specific things are in this case, a shop that carries Ferrero Rocher chocolates

No, I can't tell you for sure, but they are a stable at any gift shop and drug store. Are you transiting or departing from HKG? The store named "Free Duty" has at least 6 locations throughout the departure gate area. And "Mannings" have two. The main clusters of shops at HKG are at the East Hall (just past immigration for those departing), and at the West Hall (the "Y"). I am pretty sure you can find a store at either cluster that carries them.