The problem is, you aren't going to get official drawings. That means you have to go by visual clues.
Here's my take on it.
1) The hangar walls are not the same as the hull sides. ie, there are rooms between the outer and inner walls. (bulkheads if you want)
That means that the hangar doesn't have to conform to the outer lines of the hull.
2) The Saratoga BoGP drawings show narrowing of the aft and fwd end of the hangar walls. She is a 'supercarrier' designed and built in the same era as Enterprise.
https://maritime.org/doc/plans/cv60.pdf3) Naval Designers aren't going to design a curved inner wall unless they have to. Angled walls, yes. Curves not so much. Does that mean it's impossible, not by a long shot, just not likely in my opinion.
4) and finally, the rectangular offerings are perfectly suitable for a 1/350 model, unless you intend to remove the flight deck for viewing. You will never be able to tell if the fwd and aft sections are narrower.
Here are photos of CV60, CVN65 and CVN68 highlighting what I think are changes in the hangar wall direction.
Also included is a drawing from a training manual showing a curved hangar wall. I've come across errors like this in manuals before, The person creating the drawing doesn't care how accurate it is, as long as it gets the point across. I've added what I think it actually looks like.
And finally, overhead views of the flight decks. Interestingly, All the elevators have straight inner edges, except the furthest fwd one on Enterprise. Angled to match the hangar or hull? probably. The other ships have the door landing interface compensating for this.










