It's called "American collectors insurance" . They're based in cherry hill New Jersey. I have my '87 mustang gt vert, '92 Lincoln LSC and 1980 trans am insured with them. I've had my special interest cars insured with them for a few years, as do some of my friends. One friend with a '67 camaro got hit and they paid for the repairs with no problems at all.
here is their website if you want to look into them: www.americancollectors.com

Roy