Truly high-heeled ones are pretty much impossible to find pre-made unless you have $$$$ to spend.
You'd have to make them yourself, but if you have access to power tools it shouldn't be too hard.
The closest available would be maiko style geta, which are called okobo or pokkuri geta, which you can sometimes find on ebay. They don't have the gap in the middle, but they're pretty high. They can be fairly expensive though.
COSTUME-CON 32 - 2014
the den of sarcasm - my website
Magpie Creations - jewellery and wa-loli accessories
The International Costuming Convention is coming to Toronto Canada!
4 Days! 4 Masquerades! Dealers, Tours, Parties, Costuming Panels and Classes, Cosplay, Props, Doll Show & Competitions, Steampunk, Sci-fi, Fantasy, and so much more!