The Donald Duck Cartoon in the first post is available on DVD, I am pretty sure.
Disney and Warner have actually released quite a bit of their "banned" cartoons. The Spotlight Collections of the Looney Tunes has at least a few of the wartime cartoons (I think Bugs Bunny NIPS THE NIPS might even be on there, If I'm thinking of the right cartoon). disney released their "On the Front Lines" limited edition DVD, which had all their propoganda cartoons, unsensored like crazy dude. Also they released a lot of old Mickey Mouse cartoons where he wears black face and shit. You gotta put up with Leonard Malton or Whoopi Goldberg making frownie faces at the camera getting serious about racism before the actual cartoons though