You'll be lucky to get Derek--I like him too. But when I tried to get him for a friend three months ago, he was full up with insurance adjustment work resulting from Sandy. Maybe that's changed though. I can recommend Gale Browning of Hartoff Marine Survey Ltd too. She was the surveyor my friend hired, and I thought she was very thorough and helpful.
Derek Rhymes and Gale Browning are both NAMS certified.