Manfrotto 577 Quick Release Adapter with Sliding Plate, with Quick Safety Lock, Compatible with Most Professional Cameras, Black: Amazon.co.uk: Electronics & Photo
200PL-14 Camera Tripod Quick Release Mount QR Head Plate Adapter For Manfrotto | eBay
Tilt Head with Quick Release | Durable and Efficiency
Manfrotto MSQ6T Top Lock Travel Quick Release Adaptor | London Camera Exchange
Manfrotto 200LT-PL Quick-Release Plate | Park Cameras
Adapter for Arca-Swiss Quick Release Plate to Manfrotto RC4 Tripod Head Clamp | eBay