I found these on ebay last year, look for Scottish Mess Dress, or Buckle brogue or similar searches. Nichol Bros folded a while ago, these are old stock buckle brogues, there may yet be more of these out there to be had. I do know that this seller has them from time to time, however there are others out there as well
http://stores.ebay.ca/Bugpipers-Pipe...sxQ3asstQQtZkm