Home Owners Insurance and NVR

Ok, we are first time home buyers so this topic is new to us. Late bloomers, we know :) I was asked to provide documentation of contact info and a policy within 30 days before closing. What on earth can I provide NVR without an actual policy? A quote? We have all of our other insurance through Allstate and I must say, any claim we have ever made was covered quickly and with ease, so we were going to start with them. Any suggestions? From what I have read, I can get decent insurance for $600/year approximately. But again, this is not my forte! I have not even started this process at all and I'm guessing I should have! No one told, but then again, I never asked. Clearly on my to do list now.

We also just spent the last several hours digging through documents to send to NVR- I knew this was too easy initially! However a little scared on one of the items asked for because it seems too closely related to the NVR freak out last week. Plus the email referenced our April 1st closing date, which we are NO where close to meeting due to starting late and this current polar vortex. I've been waiting to quote the weather channel! Haha!

Any suggestions re: home owners insurance very welcomed!