Speaking of Grado and fleabay, this $10 case looks like it could fit the ESW9: http://www.ebay.com/itm/i-Pod-STORAGE-GRADO-HEADPHONES-HEADSET-HARD-CASE-BAG-/160982763520. It's hard to tell, but the ESW9 might be a little snug. However, if you look at the picture with the case laying open flat, I think the headphones would fit better with the earcups towards the center (hinge) area. Note how the curvature of the opposite end looks like it's a better match for the shape of the headband.
































