Explain what "modernist" means and I may be able to help. I have a few at home but have no clue if they could help you out.

hi OP! hopefully some of the art historians can help out on this one, but FYI, there have been various questions in the sub on WWII propaganda posters, some broad, some poster-specific. I've taken a quick look; these may(?) be of some interest to you, either for the posters themselves, the responses, or links/references to books or other source material

in no particular order..

general:

• How did Americans react when they learned that Hirohito would not only escape prosecution but also keep the throne following WWII?

• What is the significance of the 1778 date on this poster?

• Why did American WWII posters portray the Japanese as super/sub-human, yet, when targeting Germany, mainly focused on the threat of Nazism/war atrocities?

• "Hitler and the Japs"--how and why were Japanese and Germans in WWII seen differently?

• During WWII, what was the public reaction to the propaganda posters produced by the allied governments? Did they have the desired effect?

specific poster(s):

• Nazi Propaganda poster

• Keep Calm and Carry On - What's the story? - FYI, there's also a video about this poster kicking around

• How prevalent were the "Keep Calm and Carry On" posters throughout England during WWII?

• Saw two posters today. What's the story on how the United States government's take on consumerism has changed from WWII until now?

• [WWII] Could someone kindly give me a brief bit of context behind this French Propaganda Poster?

• Analyzing a WWII propaganda poster. Did I miss anything? [x-post from /r/AskHistory]

• Why did European nations use depictions of medieval images in their recruitment posters for WWI and WWII?

• Anti-Drinking Russian Propaganda Posters

• Did "Loose lips", in fact, "Sink ships"?

• aside in Did the Soviets prefer or support any specific presidential candidates in US elections?

• Did the Allied forces ever think of themselves as the United Nations during WW2?

p.s. there's also a specialist subreddit /r/propagandaposters