I lost one of the screw backs to my Peretti Plat DBTY stud earrings while I was cleaning them (over the sink, of course). I'm sure I can get a replacement from Tiffany, but was wondering if anybody has an extra T & Co plat screw back they want to sell, or even an extra pair. I don't know if all the T & Co DBTY screw backs are the same size, but my earring posts are about .9mm wide and the screw backs are 6mm wide. Thanks!