I use a large, mobile, 6-tier high, 48" wide wire shelving unit behind the shallow wing of my desk. My test equipment is between two shelves, 6U apart, at eyeball height. Below and above that are heavier equipment and component storage, respectively.
If you don't want to go the expensive 19" rack or DIY case with rails route, then you can buy a much cheaper 2 or 3-tier wire shelving unit for your desktop. They come in sizes of 23"W, 14"D, and 21" to 33"H. The TE can overhang the front by an inch.
You can fit 14U between the shelves with this
one.