Quite a while ago, I converted my base Dominion box into a storage solution for the base game + 3 expansions plus extra materials. In the process, I wrote a Python script (get the source here) to generate pdfs of the dividers that I used. I then published those pdfs to BoardGameGeek and since then have improved them due to feedback numerous times. However, people keep putting in requests for special versions (with cropmarks, for different sets, etc.) and the file I publish keeps getting bigger and bigger due to including all version. So, instead of growing the number of versions, I've decided to try putting the script behind the web form on the left so those interested can generate their own versions. Others have also taken my source and changed it if you are looking for different things.
Initially, I am only exposing some of the options, and only accepting predefined values for those that actually take continuous values (like divider size). If there is interest, I can work on adding custom value options for some of these, and on exposing more options (e.g. back page offset).
Please note issues on github, leave feedback and requests in this thread, or contact me via BGG mail. You can also thumb the thread or the original file thread if you like these dividers, or even better post pictures of how you used them - I'm always curious.
If you would like to contribute, the code for the generator is available on github.