Here's a spreadsheet I started of foods that provide some fiber

I collected a bunch of nutritional info from Google/Wikipedia/USDC about raw, whole vegetables, berries and nuts and made a graph plotting net carbs vs fiber. It's still very much a work in progress, but I figured I'd put what I had out there in case anyone might find it useful.

Google Sheets link: https://docs.google.com/spreadsheets/d/1GjICx-KAMrxGTU2OAiTVkN0jMe38DbiFY1lTzT44JCQ/edit?usp=sharing