its a long shot, but you could try tamara deschamps of trinity chameleons. i dont think shes got any right now but she has had them in the past and she keeps several xanths. she also does international reptile import/export, so if anybody could hook you up or set you on the right path, it would likely be her.
shes noted for exceptional stock and taking obsessively good care of her animals, but i should warn you, most of her stuff is a little on the pricey side. imo, probably money well spent. jmo