OOAK Black Diamond from a 2012 webcame sale. Painted by D'Arry Jone Frank. Sounds like there were 2 models named Black Diamond and Painted by D'Arry in 2012. Could have been a small run where each of the customizations were a bit different, technically making them all OOAK's.
Here is the link to the other model: http://www.stonehorseref.com/node/37609.