In my search for an alternate source for bronze turnbuckles (besides Bristol Bronze and Jamestown), I found "Classic Marine".
http://www.classicmarine.co.uk
Considering the current currency exchange rates and costs of shipping, I was amazed to find that the prices were actually BETTER than what I could find in the U.S.
Rigging, deck fittings, portlights, etc. They've got some good looking stuff.