Check out the A&A Variants forum where there is a sticky about a company called FMG that is producing sets of pieces for each nation. If you can wait till he has all the molds done, you can get any nation you want in new high quality plastic pieces.
They always add flare like what you were saying attack on russia only formidable until japan attacks them which would be really historical and maybe making territories like “midway” worth an ipc for the axis and not for the allies love house rules like that