You can try Robbin (a male) at Midwestclassics insurance.
robbin@midwestclassicins.com
They insure through American Modern with agreed value. Easy to deal with, rates are low. I have my ERA and three other classic cars insured with him.
I used to insure with American Collectors until I tried to add my ERA and they didn’t want to deal with it.
Another place is the National Corvette Museum. They insure all sorts of classic cars and use American Modern. You don’t have to have a Corvette.
https://www.ncminsurance.com/
The Corvette guys rave about how good they are especially the support they provide if your car gets damaged. The main guy they deal with is Adam.
Good luck