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
iShoot Universal QR Clamp Manfrotto RC4 Adapter Change for AS Compatible with Manfrotto 405 410 488RC4 498RC4 808RC4 IS-410PLPRO - AliExpress
iShoot Universal QR Clamp Manfrotto RC4 Adapter Change for AS Compatible with Manfrotto 405 410 488RC4 498RC4 808RC4 IS-410PLPRO - AliExpress
498RC4 Midi Ball Head With RC4 QR Plate at Acephoto.net
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
Manfrotto 410PL Quick Release Plate - for RC4 Quick Release
Clamp Converter fr 200PL Quick Release Plate to Manfrotto RC4 488RC4 Tripod Head | eBay
Manfrotto 808RC4 3-Way, Pan-and-Tilt Head with 410PL Quick
Converter Arca Quick Release Plate to Manfrotto RC4 405 Tripod Ball Head Clamp | eBay