After a long 6 year project, I am purchasing watches as gifts for 12 colleagues who worked from the beginning with me on this project. 4 of the 12 have indicated a preference for a Patek. I would like to purchase 3 Perpetuals and 1 Annual Calendar Patek watches. I prefer the 5159, 5140, 5396 and 5146. I have found a couple watches here and there with Authorized Dealers, but I would prefer to purchase from one authorized dealer, if possible. This goal might be impossible given the relative rarity of these watches. Does anyone have a recommendation of authorized dealers to contact who might have an inventory of these watches? I am only interested in purchasing from an authorized dealer because I want each recipient to receive a warranty card with their name already filled out. These watches are being purchased as gifts for people who will keep them for a lifetime, not to flip or for speculation. I can convince any dealer that I have no other purpose other than giving a gift. Any advice would be helpful.