IIRC, the Brutes were "inspired" by the scene in American Werewolf in London where the german dressed demon like things gun down "The Americans" family. They still look alot like Orcs in German uniforms.
Pinnacle used to do a box set of Brutes. But visiting Jeff Valent Studios and the Great White Game store doesn't show any in their online catalogs.
If you really wanted some, I'd start by asking Jeff Valent if he still can cast some up. I think he was the caster for those models in the first place, and since he still sells some of the Weird War miniatures ... he might still have a license to cast/sell them. It's a long shot though.
If that doesn't work, try asking over at Great White Games ... they might have some floating around.
Not much help,