Urgent HELP / Lost OS, Can Only access TWRYP (Recovery)

While attempting to install B330 on my Honor 7 I ended up without any OS whatsoever. I do have Recovyer Installed but I can't find a .rar stock room to flash from scratch. All of them need you to go to "Software Upgrade" which I can't reach as it is launching into Recovery.

I'm unsure which B Version I had, I remember being on 5.0.2

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