Kensington K64962EUA SafeDome Cable Lock for iMac with Ultra Cable, ClickSafe Lock and Full Adjustability, 1.5m Length, black : Amazon.co.uk: Computers & Accessories
Kensington Safe Stand for iMac : Amazon.co.uk: Computers & Accessories
Apple Begins Selling Kensington's Mac Studio Locking Kit | MacRumors Forums