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: Amazon.co.uk: Computers & Accessories
VESA Adapter for 200x200 or 200x100 | AMRV201 — Amer Mounts
VESA Mount Adapter Kit for iMac and LED Cinema
HFTEK® VESA Mount Adapter Mounting Kit for iMac/LED Cinema/Thunderbolt Display (HF72AB): Amazon.co.uk: Electronics & Photo
HumanCentric VESA Mount Adapter compatible with Apple Cinema Displays | 20 inch, 23 inch, 30 inch | Replaces Apple M9649G/A: Amazon.co.uk: Electronics & Photo