If you missed the Ruffle Pump from Marc Jacobs Fall '07 collection, the good news is that a version in green-blue is still available (with limited sizes) & on sale for $417.90 at Net-A-Porter:

  

But if that still seems a little extravegant, try the inspired Dream Patent Pump from Forever 21 for only $22.80 (limited sizes available online, but stores seem to have them in stock):