as I find things. I buy used bronze fittings any time I see them, if I can possibly use them

Here's one link

http://www.classicmarine.co.uk/

And by the way, Johnson Marine has bronze clevis pins. I have bronze turn buckles and toggles.

I tried Port Townsend Foundry out on the west coast looking for a gooseneck, but couldn't even get a response. And Bristol Bronze works, but ya gotta be patient