[REQUEST] A pre-rooted FTF file 5.1.1 stock ROM for Customized IT Z1C

Hi,
I'm looking for a pre-rooted Generic Italy (Customized IT) 5.1.1 FTF FIle (14.6.A.0.368)

I mean, a pre-rooted ftf file that I can flash with flashtool on my bootloader locked Z1C, not a zip file via recovery, because I don't have a recovery installed.

I'm on stock 5.1.1 ROM, goes very well...but without root I'm very annoing by Ad, Not working Titanium Backup, root explorer and so on...

I try to root it with KingRoot App, but is compatible with 5.0 only. I don't want to come back to 5.0.2 and than reflash only kernel...

Someone can help me?
Or can pre-root stock 5.1.1 customized IT ROM from this link ?

Thanks in advance to all.