Huawei Honor 7, Bricked after B180. TWRP

Huawei recently shipped update B180.
They advised to unroot the phone first, but I have been stupid and updated with TWRP installed on the second recovery partition (e-recovery?) and the update failed.
My phone now won’t boot. I can put it in fastboot/recovery mode and access TWRP, so I guess all I need is a stock ROM.

I cannot find anything useful for Honor 7 with Google, I would like a recent ROM (most recent I found is a B130).

I would also appreciate some advice on how to recover from this boot freeze.
Would flashing a stock ROM with TWRP be enough?

Thank you very much.
I’m kinda pissed since that phone is quite expensive.