You might want to check with an independent agent who specializes in antiques, collectibles, anything out of the ordinary. Companies that specialize in that type of insurance are often cheaper and more reasonable than the company you have your homeowner's insurance with. We insure 2 collectible cars thru a specialty insurance company for a fraction of what you can insure them thru a regular insurance company. You might have more luck that way with them understanding what you doing and what you need. A lot will also depend in how much you are insuring it for. When the amounts get high, the insurance companies get more demanding.
Here's in interesting link about insuring quilts
http://lostquilt.com/protecting-quil...g-your-quilts/