So I bought a set of the little silicone wire rolls from Adafruit, and I really like the wire a lot.
Or course I wanted a holder for them. I first came across the carousel by the Adafruit folks, and printed one out.
But I couldn't keep the wire in the notch, and I wanted to better solution.
So I came up with this. It holds the 6 rolls, but you can slice it down with something like netfabb, and make versions for anything from 1 to 6 rolls.
The 1st version I came up with, I felt the wire opening was too close to the bottom to make it practical, so I added a little triangle to the bottom, raising the front up 12mm (why 12mm, who knows). But I provided the STLs for both versions.
Anyway, I think it works well.