I have a Collector car policy from American Modern Insurance through MK Insurance, which is located in Elmhurst, IL. They cover my Ferrari 360 and a couple of Corvettes at very reasonable prices. Contact Tamra Perto at 866-617-9970. I’ve been with them for over 25 years.
If you have an older Ferrari, State Farm "Antique and Classic" insurance is quite reasonable. You can specify a fixed value up to $500,000. There ane numerous State Farm brokers in IL and WI.
I have been using Dan Weir for all my insurance needs for 25 years. He is a broker and can write from various companies including Travellors, NatGen and others. 847-356-6400. Just insured my new 488 with him. Very professional and great customer service.