Are you absolutely sure? The Dolores model seems to be only an espadrille-platform with a texture (canvas?) black material, whereas the ones she is wearing almost look like suede. Did those come in different black finishes?
Kelly's are definitely in canvas. She has worn them before. Maybe it's the picture that makes the material look like suede.
EDIT: http://www.imagebam.com/image/b691af192859265 . There are some..pics on that page
You can clearly see that the platform is not gold! The combinations are canvas + braided raffia and suede/lamb and calf leather + patent leather (pumps + platform).
Kelly does a webcast after every show detailing her outfit. Did you check there? Maybe she gives the style? Or maybe there is a comment section with some insight?