did you try --
http://www.nequiltmuseum.org/donate-a-quilt.html ?
there is a state listing online --
http://www.quiltersresources.net/museums_usa.html
some colleges have collections; there is one infamous college with an extensive collection, i will keep looking to see if i can find it for you!
they are beautiful little gems by one determined person! hope you find what you are looking for....