A few months ago I started a terrain project which by now is almost finished. From the beginning it was meant to be a necromunda industry complex. I think it suits quite fine to play wh40k city fight on as well. Another idea is to play some (soon) home built necromunda zombie quest on it. Have anyone seen any such rules? I thought I wasn't the first with that idea Anyway here's some videos on the terrain!
I have some "making of"-material on my blog, click the link below.