Well, there are the folks who might have started this all at www.solarstik.com
is pricey--but top quality. Some of it would be no cheaper to fabricate if you had your own machine shop and sources, they've paid a lot of attention to details.
Among other things they have a "socket" that you can install in your deck
, and then a solar
"mast" drops into the socket, carrying solar panels
and a small windgen as well. That makes it relatively easy to deploy and secure, and the only real structural part is putting that socket in your deck
and bracing it adequately from below.
I'm sure they'd sell you the socket and a piece of mast
(3 or 4" diameter as I recall
?) if that was all you needed.