This wagon was released in time for the Banbury Show on September 25th 2011, and features one from the village of Aynho, just to the south of Banbury, at the junction of the lines that serve London Marylebone and the Oxford route.
94 pristine and 25 weathered wagons were produced, though the majority were sold over the weekend of the Earley and Banbury shows that September.
I have heard (Feb 2012) that the Banbury Model Railway Club still have some available - so if you'd like one, you could always try them!