AMZDIG410PL Set of 2 Ivation Replacement Quick Release Plate for The Manfrotto 410, 405, 808RC4, 498RC4, 394, 468MGRC4, MH057M0-RC4, MH055M0
File:Manfrotto 488 RC4.jpg - Wikimedia Commons
Manfrotto 410PL Quick Release Plate - for RC4 Quick Release
Amazon.com : Haoge CP-64 Quick Release Clamp with RC4 / 400PL Base Adapter Convertor for Manfrotto RC4 System to Arca-Swiss Compatible, Fit 400PL / 405/410 / RC4 : Electronics