Back on costume topic! I do know that at one point Obi-Wan Kenobi was to have a “Tatooine farmer” outfit, separate from his Jedi robes. This was basically an outfit very much like Luke’s, with a white shirt and white pants with puttees. The main change was that Ben wore a pocketed utility vest.
I’ll see if my scans of John Mollo’s sketches for that are still around somewhere.