The 2014 Yearbook has a scan of the 1914 countdown card. It does not say whether this was published by the Watchtower or independently, so please let me know if you have any further information about it.
In typical offensive fashion, the Yearbook blames the members rather than themselves for the false expectations held for 1914.
“Some Bible Students even carried a countdown card so that they could mark off each passing day. Many felt that they would be called beyond the veil, or to heaven, on that date.” Yearbook 2014 p.174