Not the Sawtooth Sabre, Bloody Sabre or any other wierd sabre variant. Just the sabre:
There are a host of fencing type class options in 1E, but the only weapon they seem able to put their full ability use to is the Rapier. The sabre is a bog standard variant fencing weapon using many of the same techniques: it would be helpful for these classes to have this weapon as an option.
Are there pathfinder stats for it anywhere?
Use either a cutlass or a scimitar and call it a sabre. They actually booth have the exact same stats. The only problem is that most fencing (swashbuckler) feats and class abilities require piercing weapons which neither of them are, nor is a sabre. Slashing grace will take care of that but that means you need to spend more feats.
The sabre is a bog standard variant fencing weapon using many of the same techniques: it would be helpful for these classes to have this weapon as an option.
Have you ever looked at a historical sabre? It has nothing to do with the modern fencing weapon. It is not a piercing weapon, but instead a (fairly heavily) curved sword design to be used by cavalry.
Pathfinder is mostly medieval equivalent fantasy, and this is what a medieval sabre looks like. For early modern versions, look at this. Straighter sabres that could/would be used for fencing didn't appear until the 19th century.