Yes, apologies for the (repeat) typo.
It looks like Google just uploaded the November '16 security releases up alongside putting back NBD90Z on the page.
I'm now seeing all three new releases, and NBD90Z back alongside it on the Nexus image site. I think it's cool that they're posting the 6.0.1 security patches as builds there, not sure the use case - but looks nice to see all those builds!
I had three people looking for it today because (of course) my Nexus 6 was the only one that wasn't pulling down the NBD91P OTA.
Looks like it's all sorted now on the Nexus site, and I flashed the NBD91P over-the-wire, which fixed my Shamu too.
Happy building!