Comment by wlesieutre

You might also look at arms that use a vertical post with a horizontal arm coming off of it, rather than the gas spring height adjustment. They can come in a variety of heights, I think mainly because the systems are designed to allow multiple rows of screens (like a big 3x2 grid).

Off the top of my head, I know I've seen this for Knoll Sapper, which the PDF brochure (linked below) says has posts up to 32" high. Not sure if the 17" horizontal extension is enough for you, though you could also drill a hole in a desk and mount the post further forward instead of clamping on the back. Or heck, clamp it on the side or front.

See page 7 here: https://www.knoll.com/document/1352941326370/Copy%20of%20Sap...