"quick release tube clamp ", the piece used to fix the "quad arm" in the wings

Dears

Does someone know where can I buy a "quick release tube clamp "?, It is the piece used to fix the “quad arm” in the wings. I add some images to show it. Maybe someone knows…thank



2021-11-09_23-11-39

Video here> 2021 09 27 1 43 07 - YouTube