If you're interested head over to http://thenon-craftycrafter.blogspot.com.au/2014/04/cricut-free-box-card-cut-file-for-you.html
All you have to do is become a follower over there and leave a comment on the post with your email address. Once I've verified you're a follower I'll email you the link to the file. :)
Oh, and it's free!!!