What companies currently produce modern-era (or other?) flat rooftops as gaming terrain/accessories?

I'm curious about the feasability of staging classic super-hero fights high above the city streets. At the gaming table. With miniatures.

If there are medieval-era roofs that a miniature can stand on, I'd be interested in that as well. Or accessories that allow minies to stand upright on a sloped surface, if such exist. For competing rogues and chases with the city guard. I have a couple of alternatives in mind for medieval, but why not go for the gold?

The only ones that come immediately to mind are Fat Dragon Games and WorldWyrks. These are both paper/cardstock however. But I think the advantage of that could be you can print which roofs you like and glue to an appropriate material such as foamcore, etc. then you can set the roof shape and angle to your liking.

If you want out of the box and ready to go, then the Terraclips sets have roofs with flat areas that can be used for minis. Someone (Jericho?) posted pics of such not too long ago. Hope that helps in your search.