I know of two full sets: one in this article from 2013 and one in scratchdesk’s collection (since 2017), But unfortunately printing numbers aren’t exactly known for English Pokémon sets in general I’m afraid, so how many full or partial sets exist is probably not too easy to determine.
Best of luck locating the Articuno, though. When you complete it, please make a collection thread to share it. 
Greetz,
Quuador