Chaos Project

I'm trying to find or do it with what I have some emergency exit stairs similar to say silent hill ones where you go from floor to floor by "rotating" stairs but this effect is kinda hard to find in a tileset and with the only tileset I found for now I made something like this:



As you can see it doesn't look bad but if there's something better I'd gladly switch over. (Tough the biggest dilemma is what to put in the dark area.)

So.... do you people know of some decent modern stairs that can portray what I tried to explain?

Thanks

Do you specifically mean metal stairs?