You might want to check this site
http://www.concreteships.org/. It has some pictures, but mostly of the wrecks.
A bonus site for you is the following one
http://www.mareud.com/Ferro-Concrete/fe ... crete.html, about British ferro-concrete ships.
picture of palo alto
I hope these help
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Thank you Kim for the crest
"Never fear to try on something new. Remember that the Titanic was built by professionals, and the Ark by an amateur"