I know all dealers are not the same. But, I was under the impression the build sheet was a requirement mandated by GDRV to their dealers. My build sheet with serial numbers also had the initials of the service tech that inspected/tested/fixed each item before I was allowed to take possession. I had an issue with my USB outlet not working on our maiden voyage, the service manager pulled up a copy of that same sheet to see who signed off on it.
In my black pouch was the owners manual for the Reflection 5th wheel, I called the dealer and they said the TT books had not been sent to them yet, so I emailed GD and they sent me one in about a week or so, hot off the presses so to speak. Maybe they can do the same for you with the AC manual.