try as i may, i did not find the thread (on bpl?) about the 'elephant's foot sale' that was posted. and elephant foot is basically a 2/3 top quilt/sleeping bag used by mountaineers to work in conjunction with a puffy down jacket. would be a good, yet expensive (most are of high quality, nunatak, western mtnrg...etc) shortie, kids bag.
in fact, the western "tamarak" is the item that first gave me ideas of making down quilts.