From what I understand, Rowman intended for the Bonus Discs for 4, 5, and 6, to be, essentially the 2nd discs for the EditDroid collection. Same menu design and everything. So you probably wouldn't NEED a case, you'd just get a 2-disc case for the editdroids, and put the Rowman bonus discs for 4, 5, and 6 in those.