Stumbled into this thread from searching something, and registered so I could reply.
The Sabitier name has been and is still used by a number of French knife producers over the past couple of centuries. Personally, I love old, original the French design. These were high carbon steel and prone to discoloration from food acids. If left wet, they will rust. If neglected, they will corrode and pit. Because of that they largely fell out favor in the U.S. market, being displaced by stainless steels.
The use of the Sabatier name became the point of a trademark infringement dispute in the U.S. several decades ago. Two of the oldest established unrelated French producers, both with the name Sabatier, claimed it. As a result of the dispute and market preferences, both left the U.S. market at that time. At least that is how the story was told several decades ago.
One of the oldest Sabatier names in Thiers knife production was Phillipe Sabatier. Many consider him to have been the original Sabatier. His descendants today operate Sabatier Aîné & Perrier. They produce the famed Sabatier-K knives. They can still be purchased online from their website (sabatier-k.com), in U.S. dollars if you wish, and the ship to the U.S.
An established French knife producer who also uses the Sabatier name is Therias Et LEconome. They've been around since 1819, but it is not clear when they added their Sabatier Mexeur et Cie line. These are produced today in the traditional design using high carbon steel. They can be purchased in the U.S. from both Fantes and Sur La Table. Fantes has a good write-up on the knives.