Reinstall B930 on Huawei mt1-u06 after custom roms

Hello,

I have a phone Huawei Mate mt1-u06 with costum rom (Pac - KK Release dev).
The recovery is installed 2.8.1.0-BangL

And I would like get back a offcial rom because I have a little problem with costum roms (the -110 error when I try to reinstall applications that disappear after moving with app2sd) ...

How can I re-install the B930 (an Update.app) ?

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