I am in the process of looking for insurance for a 25 Daytona but here are some of the companies I found that you might try.
Voyager Marine 800-342-4444 (Kim x212)
Performance Marine Asso. 888-327-8467 (Buzz)
Top Dollar 845-356-7251 (Sy Goldberg)
Elton Proter Insurance 713-772-2991 (Ken Collier)
Hugh Cotton 800-654-0851
World Wide Marind 800-339-1235 (Bob Louellen)
Butler/Buckley/Deets 305-262-0086 (x222)
Also it you look through other threads in this section they have some more contact information.
Maybe you will have betterluck than me, happy hunting.