Less one that removes the anti-communist posters, I found one that added communist and socialist posters instead. More for the player homes than actual in-world replacers, but it also gave my homes the vibe of 'the one sanctuary from capitalism in the post-apocalypse'. I'll try sifting through my modlist to see if I can't find you some direct links, but they WERE findable on Nexus.

Don't the fallout games have more satire of anti-communism than they are seriously anti-communist themselves?

The country before the war was very anticommunist