-CdG-Zilchy

Ok so I know it's purchased from the pet person in Cetus but I went there yesterday and the skin was not available so either it's from a different vendor I don't know about or it's on some sort of rotation system for when it's available. So my question is does anybody know when it will be available or if there's a way to predict the rotation etc? And if it is from a different vendor entirely where do I need to look? Thanks in advance.