Unrooted, can't update

[Nehebkau]

Hey guys, I unrooted recently as kind of an emergency as my phone triggered the update but obviously wasn't taking it as it was rooted, restarting over and over again trying to install it. Upon unrooting I either am too far behind on OTAs to acquire any updates or there is just a perpetual server error I am getting. Any hints, or does anyone know where someone has the official update.zips that would get me back into good shape?