I just ordered some plastic bags from Amazon, 6" x 9" that fit Gina's stamp sets. They are nice and thick, like freezer bags, so they don't tear very easily. I really love them! Here is the link to see the bags:
Then, I put them all in clear bins (link follows), but of course I didn't use the cover. If you have leftover bins I'm sure you could find a good use for them for other stamping products, or even in your fridge!!!!