There's a zombie unit here that you could always just paint the .dds file white yourself if need be; http://forums.civfanatics.com/showthread.php?t=525542
Just an idea if you're needing something quickly.
Right I already have the ice golem zombie, but we want a true walker at some point. And one with a sword or lance. By the way that zombie. Do you know what animations that unit uses? Never mind it uses Jaguar warrior.
Directly converting from civ4 is quite quick for me by now.