Technical Brake limiting valve arm

Currently reading:
Technical Brake limiting valve arm

Nov 9, 2022
Hi all, new to the group. Question for you. I have a Punto mark 2, 2004, 1.2. It has failed the MOT because the arm/spring from the brake limiting valve to the rear axle is missing. I guess it has fallen off. The valve is fine. I am trying to find the arm on its own, rather than buy the whole valve and arm together, which is expensive. Does anyone know where to find one? I have trawled the internet with no success so far. Thanks in advance.