Filament holder - customizable spool

I have designed a [frame stabilizer](http://www.thingiverse.com/thing:725379) for my Prusa i3 rework. A horizontal threaded rod is attached on the diagonal threaded rod of the frame stabilizer and I use it as a spool holder.
I have a few meters of assorted colors of filament without a spool and I thought it will be nice to create a custom spool for them. It's a customizable thing and I can attach it on the horizontal threaded rod I attached on my frame stabilizer.
If you have a horizontal