When Zurich quit insuring boats, Fitzpatrick Agency, Inc, 840 Clinton Ave, Bridgeport, CT 06604 searched a bunch of different boat insurers and found that Ace had the best coverage and price for me. They are at www.fitzpatrickagency.com or can be reached at 203-336-2183. It'd be worth a phone call to see what they turn up. It won't cost you anything.
Usual blablabla, I'm just a satisfied customer.