Midcentury Modern Insurance Appraisal  

I have managed to accumulate an inordinate amount of midcentury mordern items that, when added up, would be pretty expensive to replace. My insurance company says I must have a certified insurance appraisal to get full value for these items in the event of a loss. However, my efforts to find such an appraiser with any midcentury modern experience has been wildly unsuccessful. [I've tried several big auctionhouses and dealers already.] Does anyone know a good, reputable certified appraiser?