"Cloning" any specific kind of cider is almost impossible. it is not like beer where we can use (nearly) the same ingredients available to the original manufacturer or brewer.
The taste of hard cider is VERY dependent on the kinds of apples used in the unfermented must, as well as the companies specifics on amount of sugar/acid/tannins in the finished product. There is almost no way to know these specifics (unless they tell you the kinds of apples, ie. granny smith cider). Also, unless you have a kegging setup, forget it, you won't get a cider anything like anything hornsby's does, or widers, strongbow, etc. because it's all backsweetened a lot then force-carb'd.
Primary:Russian River Redemption clone, Kelly's Melomel, Graham's English Cider 22-23
Aging:Public House Dry Stout, Procrastination Porter, Mr. Brown Ale, Westvleteren 12 Clone, Mead, Duvel Clone, Graham's English Cider 6-21, Belgian Draak Strong Ale, Fig Melomel, Acerglyn, Restorative Tonic Metheglyn