I would like for every one of us Slingshot owners to call Hagerty and ask if they cover the Slingshot. Hagerty is a specialty insurer of collectible vehicles and non-daily drivers at an affordable rate for a declared value. They cover my '08 Vette, '63 Merc, '73 Mustang and '80 CJ5. If they would cover the Sling I would save money over Progressive.
Maybe if they get enough requests (I asked them yesterday) they will pick it up. Not only are the rates good but the customer service is top notch.
It'll just take a minute or two (after listening to U2 on hold) so go ahead and call!
1.877.922.8701