Anchor Bay and Arrow did, but they're both out of print.
That's right. I get them confused sometimes.
I have that Ultimate Edition dvd of Dawn of the Dead from Anchor Bay. The one that has like 4 different versions of the film. And I have the SF blu of Day of the Dead. I'm pretty happy with my Dawn of the Dead dvd so I doubt I'd upgrade unless they put the Ult. Ed. on bluray, which is unlikely.
Edit: Just googled the arrow version of Dawn and it is the ultimate edition apparently. Shit! I want it!
Edit #2: It looks like the Director's Cut and Argento Cut are only on dvd's in that Arrow version. Guess I'm sticking with what I got.