Where can I download the stock clock apk for LG G3? I deleted the stock clock app on the LG G3 (Model D855) without knowing that I need it for the Quick Circle Case to correctly display the Clock Faces when the lid is closed.

Do you know a place where I can download the stock APK file, it goes something like "com.lge.alarmclock", the easy access from Google Drive is not longer working:

https://drive.google.com/file/d/0B3dApvWjgNoKVmU5cjlUMFdwbW8/edit?usp=sharing
not working

I tried doing the hard reset but the app did not get back.

Or if anyone would be so kind to back it up for me, I would deeply appreciate it.

Thank you in advance for your time and help.
A "hard reset" would not change the /system partition, which is where the .apk originates. Since you deleted the system app, I'm going to assume that you have root access. After installing the .apk, I recommend manually pushing it to /system/priv-app/ (command: adb push LGAlarmClock.apk /system/priv-app/, replacing LGAlarmClock.apk with the full path to the .apk. Alternatively, you can change it from a user app to a system app (via an app like Titanium Backup if you install it from PackageInstaller, but I highly recommend pushing it to /system/priv-app/ from adb. Here is a link to LGAlarmClock.apk, pulled from the latest stock lollipop 5.0 build on XDA.