Yes, it's entirely on you (or others in your world willing to do some of the work) to find another world with an appropriate number of openings that is interested. See the thread tzentmeyer links to in the first post on this page; that's the one they are referring you to, I'd think. Support's role is to make the merger happen in the system after you have 32 owners on board from two or more worlds, and have a plan for those 32 owners filling the eight divisions. The base of likely suitors is the list of worlds and how many openings each has. If you have 22 owners who want to merge, you need to find a world with, say, 13-15 openings, assuming that a few won't want to merge even if most of the world does.