All Xperia official stock firmware download (.ftf files)

Xperia U (ST25i)

6.1.1.B.1.100 Download from here
Android version: 4.0.4
Xperia ZL

(C6506)

10.3.A.0.423 Download from here
Android 4.2.2
(C6502)

10.1.1.A.1.253 Download from here
Android 4.1.2
10.3.A.0.423_Indonesia Generic Download from here
Android 4.2.2
(C6503)

10.3.A.0.423_German Customised Download from here
Android 4.2.2