Hi, on my phone rear camera lens is scrached and photos are blurry. Where i can get new camera lens and is it possible to change?

i am not able to install cm-12.1-20150517-NIGHTLY-e975.zip via twrp.. now i wiped all my storage i cant boot my device.. i added rom file via adb and when i try to install it.. it shows error i am attaching the error pictures ..
am i doing some thing wrong? do i have to install some previous version before installing this one?

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