u/scurvylemur, I ended up ordering the ErGear Ultrawide Monitor Arm with USB, Monitor Mount Fits 13-35” Screen, Monitor Stand with Full Motion Gas Spring Arm Holds from 4.4lbs to 26.4lbs arm and after adjusting the tension, etc. its working perfectly. Fits in the desk cable tray with a bit of room to spare on the shortest setting (top holes). Finally have all of my monitors on arms!
The picture actually wasn't changed, here's the link to the amazon page
For anyone interested, here's the link to the amazon page. The funny thing is that Ergear has done the exact same mistake with the first picture of lots of other vesa mounts
I went with 3 single monitor arms to do a triple 32'' wraparound build. No regrets.
I went with this one https://www.amazon.com/gp/product/B098JT9SFR