Ah Westwind, why do you torment me so! You made alternate heads for historical and pulp WWII but neglect to include pictures or even basic information like, oh, how many we get in a pack!
Gasmasks and Zombies:
http://www.westwindproductions.co.uk/catalog/index.php?cPath=126_144_149
Historicals including berets:
http://www.westwindproductions.co.uk/catalog/index.php?cPath=130
The historical packs seem to have 20 based on the picture but even that is not confirmed.
So questions...
How many in a pack?
Are there any pictures of gas mask and zombie heads?
Has anyone tried them with GW plastic Imperial Guard?
Why, oh why do companies make products but neglect to take even the most basic steps to market them?