Pacific Net and Twine has the case and tubes. Derby got me onto them a while ago. I have not seen them anywhere else.
Pretty sweet set up for sure. I like how you can flip the whole case around and see what's in there. I have everything from hootchies, spoons, and teaser heads tied up and ready to go. You can put multiple rigs of the same color in one tube because both ends of the tube have caps. Slick.