OTA zip pack? Keep root?

I just had a carrier update(Telus canada) pushed to my phone and i'd like to update however I do not want to loose root/etc.
Does anyone know of a patched version of this OTA zip or how to patch it?

Or where can i find the OTA in my phnoe to try and use flashfire?

Version : G930W8VLU2API1
PDA : G930W8OYA2API1
CSC : G930W8VLU2API1
Phone : G930W8VLU2API1
Size : 178.69MB

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