I made two of these for my VSF game last night, but I'm posting it here since zombies are only tangentially VSF, or at least they will be till I can afford the latest Hinterland release.
All parts are Reaper, from their Court of Abyst models and a skeletal dragon. The idea was that when a unit got within 3D6" of one of these, d6 zombies would burrow up and attack.
The idea behind the mobile one I haven't posted yet because I'm not satisfied with it is that it would be a squad leader for zombie troopers - as soon as it's destroyed, the zombies go automata and attack the closest unit, friend or foe.