Declared Value Insurance.....any carriers you recommend?

Had Progressive for many years with declared or agreed value policies. Fair/easy on establishing value and good rates. No claims so can’t speak to that. Only dumped them because they found it necessary to jack our other vehicle rates.
Currently have American Family. No issues getting policies and decent premiums. No claims , so …

Have you tried your auto or homeowners company?
Note, if it’s something custom you may need an appraisal to substantiate the limits.