NewerTech® : Computer Accessories and Upgrades : Security Adapter with Kensington Slot
SP-P02 Adhesive Adapter Anchors With 3x7mm Kensington Security Slot With Glue For Tablet Mobile Macbook (Black) - Online at Best Price in Singapore only on ElectronicsCrazy.sg
Apple Mac Pro 6.1 (2013) Security Lock Adapter (kensington slot adapter). | eBay
Security Slot Adapter Kit for Ultrabook™ | Desk Mount Security Anchor Point | Kensington