Manfrotto 323 RC2 System Quick Release Adapter with 200PL-14 323
Amazon.com : Manfrotto Cameras Quick Release Plate with Special Adapter (200PL) : Tripod Camera Mounts : Electronics
Low Pro Quick Release Adapter Plate - RC4 - 410PL | Manfrotto US
Amazon.com : SIOTI 323 RC2 Quick Release Plate Adapter, Rapid Connect Adapter with Quick Release Plate for Man frotto Monopod, Manfrotto Tripod, or Other Ball Head and Tripod : Electronics
Manfrotto 357-1 Rapid Connect Adapter with 357PLV-1 Camera 357-1