Manfrotto 322RA Quick Release Adapter 322RA B&H Photo Video
Manfrotto 323 RC2 System Quick Release Adapter with 200PL-14 Plate - The Camera Exchange
Amazon.com : SIOTI 323 RC2 Quick Release Plate Adapter, Rapid Connect Adapter with Quick Release Plate for Manfrotto Monopod, Manfrotto Tripod, or Other Ball Head and Tripod : Electronics
Spider Camera Holster AS-RC2 Adapter Plate 311 B&H Photo Video
AS-RC2 Adapter Plate
AS-RC2 Adapter Plate
Adapter for Arca-Swiss Quick Release Plate to Manfrotto RC2 Tripod Head Clamp | eBay
Amazon.com : UTEBIT 323 RC2 Quick Release Plate Compatible with Manfrotto 200PL-14 QR Plates Adapter with Rapid Connect Clamp and 1/4'' to 3/8'' Screw for DSLR Camera Tripod Ball Head : Electronics