Well, what comes to mind (out of the blue) is that you could build the dataview using an XTemplate. In the template you can have variables and all sorts of other things (check the docs).
So let's say you want to insert a divider, or some component at every n'th place. You could check the xindex template variable if it's, say (xindex % n'th === 0). If so, just insert a divider or something rather.