This guy send me an email regarding helping him find some work for cheap. However, he has some work that looks familiar to your work and others. Thought I just let you know. Just in case there is some miss understanding considering I think i saw you had concept art for this aswell? His carbonmade website is http://melanbarba.carbonmade.com/about and the image/character im speaking about is this one .
He does have a lot of fan work in his portfolio. Thanks for bringing it to my attention but all of his work seems to be his. His "witch girl" model is definitely based on the same Rabbiteyes concept as is mine. But you can clearly see there are many ways to skin the same cat
All the best,