Ahhh...thanks for the suggestion of Naot! I had never heard of them, but I found several styles that say "narrow to medium", and the reviews indicate that they are super comfortable and walkable; that would be perfect. I have never spent so much on a pair of shoes in my life (other than hiking boots), but these might just be worth it. May wait for a sale. I put a couple of pairs (Laura and Kayla styles) onto my Amazon wishlist while I'm thinking about it. These really do look the most like what I have in mind of anything I've seen so far, and it says they fit narrower feet. Perfect -- thanks!