Well, there are the folks who might have started this all at
www.solarstik.com
Their
gear 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.