I bought these about a year ago at Anthropologie, and although I can’t find them on their website they do have a few other attractive options (here and here). I did a search on See Jane Work and found a bunch of options as well (these and these and these), and then did a broader Google search and found these exact folders at Galison. Does having cute folders make organizing easier? Yes, yes it does. At least, it gives me something pretty to look at as I go to file away my awful medical bills.