VESA Mounting Adapter Kit for iMac – VIVO - desk solutions, screen mounting, and more
VESA Mount Adapter - Apple
Apple VESA Mount Kit - iMac 21.5″ (Late 2015-2019)
Amazon.com: VIVO Adapter VESA Mount Kit, Bracket Set for Apple 21.5 inch and 27 inch iMac, Late 2009 to 2020 Models, LED Display Computer, Stand-MACB : Electronics
VESA Adapter for M1 iMac – VIVO - desk solutions, screen mounting, and more
Amazon.com: Amer VESA Kit : Electronics
Amazon.com: HumanCentric VESA Mount Adapter for iMac 24 Inch (Aluminum), iMac 27 Inch (2009, 2010, 2011), LED Cinema Display, Thunderbolt Displays, Replaces Apple iMac VESA Adapter MD179ZM/A, iMac VESA Kit : Electronics