Not sure I'm putting this in the right forum, but here goes.
I have been looking to put a set of twin 100al cylinders together. But I have been as yet unable to locate a manifold that is set for a center mount double hose. There are numerous versions of tech manifolds.
Cousteau used a longer inhalation hose (and maybe exhuast) for the Britannic exploration.
Does anyone know a source for the longer hoses or maybe a manifold that was designed for the larger diameter cylinders (8in dia)? The US Navy aluminum 90's were designed for a manifold that would work on the 8in dia cylinders. But as yet I have been unable to locate a non-mag military manifold for the twin 90 aluminum cylinders.