Indeed, there are several sources for collector car insurance here in the good ol' USA. Most will impose mileage limits, require that the car be garaged, and all I checked prohibit driving to work. In exchange for those restrictions, they'll insure the car for an agreed cash value for just a few hundred a year--ranges from maybe $150-200 to $400-500 as I recall from checking a while back. As you'd expect, the lower the premium, the tighter the restrictions as a general rule.
For leads on companies, Hemmings is always good, and also check out
www.buyclassiccars.com.
As I drive mine daily in the summer, I cover it on my regular auto policy but suspend the liability coverages when it's in storage.