Okay, first things first - please disregard the patterns on these bags! There were no textiles that really did it for me, anywhere I looked. That being said... I'd love to create an updated Bermuda Bag collection...with designs I'd actually want to carry. No offense, just that I love the reference, but not the preppy preference.
This bag was originally created as a McCall's sewing pattern in the late 70's or early 80's and really caught on. I remember desperately hoping my neighbor would accidentally put her's in my box of hand-me downs.
This shop has quite a selection - I prefer pearl buttons on my bermuda bag, tho
You could also maybe send a custom fabric to this person.
Or, get the pattern and some handles here