Amazon.com : NEEWER Quick Release Plate, Camera Mount Adapter with 1/4" and 3/8" Screw Thread, Quick Release System for Tripod, Monopod, Stabilizer, Slider, Max. Load 11lb/5kg (QRP-1) : Electronics
Amazon.com: Sequpr Camera Tripod Quick Release Plate Adapter with 1/4'' Screw, 200PL-14 323 Camera Mounting Adapter for Manfrotto, Universal Quick Release Plate System for Camera Gimbal, Black : Electronics