Xperia Z3 DRM Restore I unlocked my Xperia Z3 without read risks (I'm in shame). Now I can't update phone with Sony Bridge, also read that I lost DRM licences.

So If some of my friends who has Z3 and still have bootlock, can take a TA partition backup for my device ? Can I restore this partition to my device ?
I couldn't update phone cause of bootlock. I relocked it and updates are working... But keys are gone forever.