True, there isn't a director's cut. (and certainly not the 103 minute version, which made Peckinpah sue the studio!)
The preview version is the closest. But it wasn't fine tuned and also included some alternate takes
that probably would have been altered by him.
The 2005 cut unfortunately has some deliberate editing choices which are hard to accept (including some sloppy misttakes)
That?s my take on it too.