Is there a way to get stock system image for the Meizu 5 Pro?

I've just installed OTA 12 on my Meizu 5 Pro, excited about finally being able to use the fingerprint reader to unlock the device.
Unfortunately, after briefly setting the unlock method to 'swipe' in the past, setting it back to 'password' would not prompt for a password and changing it to 'fingerprint' doesn't change anything.
The phone is stuck in the 'swipe' setting, quite possibly due to something I've messed up through the terminal.
Resetting the phone does not fix the issue, so I was wondering if there was a place for me to download a stock system image I could flash onto the device. I've found a user on Askubuntu linking a 10.2 OTA image to someone wanting to flash it on a Meizu 5 Pro that originally came with Android, but before trying that I wanted to ask if there's maybe a kind of an official image so that I wouldn't have to flash my device with something off some stranger's Google drive.
And yeah, I know I should have made a system backup.

Edit: Oh, nevermind, I guess I should be doing it as shown in http://ift.tt/2aphJP0

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Is there a way to get stock system image for the Meizu 5 Pro?