I couldn't find anything under letterpress storage. I did look at the mini jetmax. The one's I thought I saw were not "cube" shaped....more like 1/2 a cube....same width but not tall.
I tried my marker case that came out of one of the mini cubes and it is the perfect height (about 4.5"tall), but I would love one's with or drawers....if I can use it as a shelf on my desk....I will fill it full of mail and crap. lol
Then I tried this with these old Ikea cubes:
But they're a little too high at 6". So, if anyone has one of those marker inserts they don't want to use, i'd consider buying it. Seems like that's the closest I can find to being the right height and depth, so it doesn't take up desk space!!! I could probably use two more, just to make it consistent along the back of my desk.