I use American Collectors, costs around $300 per year for $35k "Agreed Value", $0 deductible. Must be pleasure car, not daily driver, must be stored in locked garage, has a mileage limit, either 5k or 7.5k miles a year (don't remember which).
http://www.americancollectors.com/
I've never filed a claim, so I don't know how "good" they actually are, but hopefully I'll never have to test it.
TomC
"Crabs"