You can't any more because they haven't sold this book in almost a year at this point. If you can hunt down old copies of Previews at your comic shop, you can see where it sat in the sales rankings, but you'll probably have a hard time hunting down a Previews issue that old.
Also, just common sense will tell you that it didn't sell well if they didn't want to finish the story. Their line that the story came to a satisfactory conclusion is bull. It wasn't worth them to print more for what their return would be. They'd rather move on to more successful projects like Agent of the Empire, Legacy, and Dawn of the Jedi.