As a stage performer who has long suffered from problems of the feet, I have been blessed with the use of these extraordinary shoes but have encountered great difficulty in seeking replacements or substitutes. Interestingly, even shoes which LOOK the same have been absolute disasters, not only providing no comfort but, in fact, producing and even exacerbating pain. Interestingly, there often seems to be no visible difference between your product and others. But the difference is dramatic! Very often after our performance I have been approached by those in the audience who have asked about these shoes (which are now VERY old and VERY used!) but I have been unable to provide a source. I look forward to receiving my new Comfortrites.