I have looked for awhile to fulfill a particular need for my 392, a 22mm deployment buckle in Rose Gold that would work with a thick strap (+4mm). Happy to say I did find one and it seems to be quite a nice product! plus, it's available here in the USA. A well known if not dubious eBay seller (wholesaleoutlet990) has them and they work great! it will easily take a 5.5mm strap and surprisingly enough operate as they should, locking securely and opening easily, all for under $30. Be prepared they are HD and will take up space on your strap/wrist... I lost two adjustment holes. The center pivot / attachment is 7mm and required fitting to my strap. Available in brushed Rose, polished Yellow and brushed SS. The vendor says polished SS is available but I did not see it listed. THey are sterile with no logo or marking of any sort. Heres the eBay link: http://www.ebay.com/itm/22mm-DEPLOYMENT-BUCKLE-CLASP-THICK-3-5MM-5-5MM-STRAP-44MM-PANERAI-ROSE-A4-/171903361680?hash=item28063d2290