PM501 Manfrotto-Type QR Plate with Arca-Type Clamp | ProMediaGear
Adapter Connect Arca-Swiss Quick Release Plate to Manfrotto Tripod Fluid Head | eBay
Adapter for Arca-Swiss Quick Release Plate to Manfrotto RC2 Tripod Head Clamp | eBay
iShoot QR Plate Adapter Converter for 39mm Arca Swiss Used to Manfrotto 50mm MVH500 MVH700 Gitzo G series, GH series Fluid Head|Tripod Monopods| - AliExpress
Convert Your Manfrotto 405/410 Geared Heads to an Arca Mount: F63 Clamp Review | Architectural Photography Almanac