Masthead Comment Question

I have long assumed that the trampoline post supports for the H16 are the same extrusions (diameter and so on) as the mast, but cut to fit their purpose.

If so, can anyone advise the maker of the H-16 mast and any other pertinent information?

I am looking to acquire or craft two masthead caps for a project boat.

Or, if all fails, acquire two older mastheads...

Thanks.