Battle Systems, the company that made the Red Rocket set, has a kickstarter campaign up for a new set of terrain that would work well with Call to Arms. I am looking to pick up both sets, and have several of their Urban Apocalypse Terrain for use with Fallout and it works really well. Here is the link incase anyone is interested.
Have backed this myself. Going to work really well I think. Adding lots of new stuff all the time, a massive Waterwheel building was added today.