RandomMemory wroteCan't even find a vesa mount
A VESA mount is literally a metal square with 75x75mm or 100x100mm holes to mount on the monitor.
Again I am just trying to help as we both know you're going to have a hard time finding the stand you're looking for.
Another out-of-the-box thinking strategy might be contacting an IT department of big hospitals. MRI machines and several other machines require monitors to be mounted like that, they might give you an idea where to find them or at least tell you that they cannot be found in Lebanon in order to save you from wasting your time looking for one.