Help finding a stacking computer monitor bracket setup?

[LiraCrown 1,807]

Ok, sometime in the next few months I'm investing in a new monitor putting me up to 3 active screens at once; a lot I know. The new one will very likely be a 22" XP-Pen, a Cintiq alternative. At some point after getting the screen I expect to try and get an arm mount and I'll probably go with an Ergotron cause I'll need something pretty durable.

 

So here's the 'problem'. I have been thinking about how I plan to lay these things out and I think I want my 2 primary screens in a stacking position, one over the other like this. But because I'll be adjusting one of the screens pretty frequently I want them both on one bracket. This would be pretty convenient for me because the bottom screen will be moved into position for drawing and the one above it can be right at eye level for references or a tv show or whatever without being a strain on the neck like my current setup is. You can get brackets that hold 2 screens side by side, like this; but I cant seem to find any gear that lets you do the same thing with stacking screens. I'm curious if someone has or has seen a setup like this or may know where to get one or way to cleverly hack it or something. I'm estimating the combined weight of the 2 screens will be somewhere around 15'ish pounds and most of the arms are good for around 20, so weight isn't too much of a concern.

 

If you need some more visuals to get what I mean I can whip something up I'm sure.