Damage deposit insurance for charter boat

[alex_sauvage]

Does anybody knows/used a good company which can provided "insurance" for your charter damage deposit??? So you pay smaller amount (~5-10%) upfront, rather than be faced with multi-thousand bill later if the boat gets damaged somehow? I am chartering a boat with a smaller company in Greece and they don't provide an option of "damage deposit waiver", as do bigger charter companies like Moorings. Wondering if anybody has first hand experience in this regard.