I've made contact with the guy that made that built and he told me that the kit is not available for sale.What about this one???
Link here: http://www.mathys-motos.ch/joomla17/index.php/7-news/127-yard-built-wettbewerb
I've asked him and said it was from his private stock.Or this one...
Maybe you could ask the guy where he did got it from???