I don't have one myself currently, but one option that I've used in the past to help friends organize and sort cables (and other small objects) is to use pieces of cheap canvas and a Speedy Stitcher (Google it. Awesome tool).
You can do them as flat backed panels using two sheets of canvas, one longer than the other, or just fold one sheet over on itself to stitch up the sides. Coil each cable you plan to store and use them as spacers. Start at one end of the 'bag', and adjust the pouch so things fit nicely. Remove the cable before you start actually stitching. Use the canvas itself as a line rule and try to keep things straight.
Make the 'back' of the pouch longer so you have a flap to fold over the top, then add velcro, snaps, buttons, laces, or whatever your favourite simple fastener is. Take some extra time and 'embroider' labels on each in block lettering. Doesn't take much practice to make things look very neat and professional, just keep things lined up square.
These make excellent 'sub-storage' units that are fairly flexible and even act as basic padding for other gear once stuffed with flexible cables.
Canon EOS 7D | EF 28 f/1.8 | EF 85 f/1.8 | EF 70-200 f/4L | EF-S 17-55 | Sigma 150-500