You can download them here.
http://www.wizards.com/dnd/files/DDM_15Dun_RPG.zip
Thought I'd post that, as some of these are useful for Ravenloft, seeing as how we've got the 4E stats for a Death Knight, Chillborn, Warrior Wight, Howling Hag, Vampire Spawn, and Vampire Vizier, among other things.
Just for the hell of it, here're the stat cards for both vampires.