Index card holder/stand

I use index cards for “To-Do List” items all the time, and I thought it would be really nice to get some sort of index card holder/stand for the times when I’m working off multiple cards, which is pretty much all the time. I love this Note Card Bleacher idea, except for the $99 price tag. I think I need a 3d printer, or maybe some carving balsa foam to make what I want.

Photo D8
Index card holder/stand