I didn't say that NASA did not have the records or plans for an updated Saturn V. They are on microfilm at Marshall Space Center...the problem is that NASA can no longer have the required parts manufactured and it has forgotten how to put them all together.
And since Werner von Braun made the conscious decision to subcontract all the work out to save time, and those sub contractors are now long out of business, there's nobody around who can actually build a new version of the Saturn V.
Saturn V Got Us To the Moon, and Then Disappeared
Bolden: NASA Can't Build a Heavy Lift Launcher and it Won't
The Technical Record of the Apollo Program? A Space Junkyard (Video)
Yes. They were truly specialized and handmade.