deadmonster;
If you want a case, most suppliers will sell it to you, but reconsider for a moment. The carts last a long time if you refill them. The fiber material can be washed and reused. When the fiber completely gives out, there are materials you can get to use in its place. The only time I
throw a cart out is if it cracks from the atty heat or simply breaks for some reason, and that's not very often.
I suggest you get a dozen at most, and see how long you can keep them going. After that, if you feel you still want a case of them, go for it.
Cheers;
jd