Zerg/Alien/Spider-Insect-like buildings?

[D.a.r.k.s.t.a.r]

Hello everyone! As you all know there are tons of models for units and even for some buildings of new races. However what i am really lacking is a few buildings for a nastier race. I'm thinking about spiders/nerubians, zerg/alien, generally anything that's more of a pulsating-cocoon like thing.

Is there anything out there that i missed on my search? This is not a request for someone to start doing those. I would love to know if any of these exist. I couldn't even find Zerg buildings that work.