AVLT Single 13"-34" Monitor Arm Desk Mount fits One Flat/Curved/Ultrawide Monitor Full Motion Height Swivel Tilt Rotation Adjustable Monitor Arm - VESA/C-Clamp/Grommet/Cable Management https://www.amazon.com/dp/B01JH2NDW8/ref=cm_sw_r_cp_api_glc_fabc_GA38FbVHYPV9W?_encoding=UTF8&psc=1
Mine looks exactly like that. It supports VESA 75x75 and 100x100. The part you're showing easily slides onto the monitor arm.
Model is an A+ SMLC12. I couldn't find it outside my country, but you can Google it and get an idea of what would work. I'm sure Amazon would sell something similar under a different brand name.
Edit: found something similar on Amazon too: Link
I personally would just use three individual monitor arms
https://www.amazon.com/gp/product/B01JH2NDW8/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
i have 2 of those. they should be tall enough
Two separate mounts, I had to experiment a bit to get one that extends far enough out for the main one, and sits high enough up for the second one.
AVLT Single 13"-34" Monitor Arm... https://www.amazon.com/dp/B01JH2NDW8
WALI Premium Single LCD Monitor... https://www.amazon.com/dp/B0779JSRH5
Thanks!
Its the AVLT-Power Single Monitor Desk Mount off Amazon -- https://www.amazon.com/gp/product/B01JH2NDW8/ref=oh_aui_search_asin_title?ie=UTF8&psc=1
Thanks!
Its the AVLT-Power Single Monitor Desk Mount off Amazon -- https://www.amazon.com/gp/product/B01JH2NDW8/ref=oh_aui_search_asin_title?ie=UTF8&psc=1
I'm not OP, but I have the AVLT-Power Premium Aluminum Single Monitor Gas Spring Desk Mount Arm found here https://www.amazon.com/gp/product/B01JH2NDW8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
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Edit: this supports my 34" Acer Predator with no issues.