One of the organizers they sell for converting 5 gallon buckets to tool totes maybe? Here's one that's expensive but good quality:
http://www.cableorganizer.com/klein-...organizer.html
Harbor freight cheepie:
http://www.harborfreight.com/52-pock...zer-94868.html
I can guarantee the quality isn't as good but then your application is relatively light duty.
It wouldn't be too difficult to make your own with pockets configured the way you want them as another option too.
Rodney