shbc 20l carb and matching manifold

Hi I have a vespa p125 ets that I'm trying to get back on the road. I need a shbc carb and matching manifold. Can anyone tell me if this manifold takes the outer flange or does this carb clamp onto the manifold without the outer flange as I can get the intake manifold and carb no bother but no one seems to stock a intake manifold flange for this set up.