Liability Insurance

Good day, checking to see if anyone has had any luck resolving the issue of finding liability insurance for jet boards. I live in a private lake community and they require liability insurance for motorized vehicles. I found one broker, but he was very unresponsive and wanted 35% of the value of the board annually. Any insight would be appreciated.

Check out this insurance Nammert Jetboard efoil insurance (Online Rechner: Bootsversicherung)
They do all kinds of efoils and jetboards and mine was only 48€ a year… Find this quite ok and they have a good reputation in Germany&europe