I was fortunate that someone was willing to sell to me overseas. I think I've used nearly all of them (about twenty I think). I use them for storing all sorts of stuff and the larger (BG)ones were the perfect size for my die cutting storage system.
When I recently reorganized my craft room I wanted to create a unified storage system for ALL my dies and embossing folders. I found the perfect sized woven baskets to suit my needs. It stores all my Sizzix and Spellbinders, except the extra long ones which slot in beside the baskets on the shelf (pic 1). And these baskets neatly fit four large clamcases that the BG stamps come in. (pic2). Those clamshells are labled according to company.(pic 3) The clamshells are especially handy for storing the longer Cherry Lynn dies.
If I take my thin dies to a gathering this is how I carry them. In fact when I pack my trolley half of it is taken up with clamshells. I use them for projects and supplies. They are so easy to see what I have and keep things organized and accessable. I make sure I have a few empities just for my crafting trips. I've never been so organized.