A pal from England brought me a bottle of Somerset 10 year old "cider brandy". I'm a big fan of Groult Calvados as well as Huard. While this isn't quite up to the level of those two it's a nice subsitute. A little bit more rustic, a little rough. I don't think they export yet, but if you love Calva and are in the UK, it might be worth seeking out.