A company I used to work for sold a line of stuff for this called
"leader keepers", "tackle keepers", etc. It was just rigid polyethylene
tubing in various diameters and lengths with poly capplugs on each end.
Worked great, albeit a little expensive. I don't even know if anything
like that is on the market, but you could easily make up your own. Any
clear or semi-clear poly tubing with corks or caps in the end would
work great to store individual setups.