>>71055291/72 is fairly close to the scale of most wargame miniatures. If you don't mind going slightly bigger, you'd have a huge amount of options. Most of them you'd have to paint yourself, though.
>http://vampifansworldoftheundead.blogspot.com/2010/11/size-comparison-charts-zombies-part-1.htmlHere's some comparisons of various zombies.