Isn't a shirt from From Here to Eternity more likely to be from 1952 than 1941? Hollywood isn't known for its attention to period detail--especially in that time period.
The problem here is that people are posting shirt patterns they like, but I'm looking for one that has a pattern that existed before the war...
At the more affordable end of the spectrum:
https://avantishirts.com/collections/men?page=1
I haven't bought from here yet, but like some of the patterns.