Topic: Found: Surplus power spoolers with two spools for $8 each
At American Science and Surplus, I found these power spooler sets for $7.95 each. It comes with two empty 7-1/2 x 6 3/4 spools. It looks like one would need to drill out the ends of the spool or make an adapter to fit them onto a normal printer, but even then the price just for the spools isn't so bad, but you get a battery-operated spooler/screwdriver too. I ordered a couple to check them out, and perhaps experiment with creating some sort of ghetto filament winder setup.
http://www.sciplus.com/p/POWER-CORD-SPOOLER_49235
Here are some videos of it in action in its intended purpose (winding xmas lights):