I stumbled on German designer Kronier Creations a few months ago, after reading a sort of bitter comment on another post about how they'd been making these platform boots for decades before those Nina Ricci's broke onto the scene and became enormously popular. I don't know that the Nina Ricci's were ever produced for the public, but these are a totally viable alternative! And Kronier makes them in blue metallic and a latexy type material. How can one resist latex??
Images via Kronier Creations