No point in re-inventing the wheel they say. So here is a blog I ran across the other day, when looking at 28mm zombie miniature suppliers and makers.
It is a little dated. 2006. But not too much has changed. Most of the makers mentioned are still about. Though it does not include Victory Force Miniatures I don't think.
Some nice photos and good comparisons.
So worth a look if you feel a zombie outbreak is likley.