Huawei Ascend Y530 can't flash back to stock ROM

Hello! I have recently installed that known-to-work CyanogenMod 11 ROM on my Ascend Y530. The speed is incredible, but there are some huge disadvantages: can't save downloads and apps to SD Card (please don't tell me about APP2SD or some other app, already been tried), camera doesn't work, YouTube only in 360p (Xposed has already been tried, didn't work). So, the only solution would be to install the old ROM back. Tried to use that Update.app trick and "update" the phone, but the phone refuses to "update". So, the solutions turn down to only one: a zipped ROM installer, just like the others. I own another Ascend Y530, which has original ROM, so if someone knows how to extract ROM as zip installer, please inform me about it and help me.
 
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