What's the purpose of a tool box?
Yes, right - to hold tools. And why does one have tools?
Here's a hint - it's not to spend money buying things you already have.
New stuff is made-in-China crap anyway. Likely if you have an older box it's twice as good as anything you'll find these days which (IMHO) makes it automatically worth fixing up and keeping. I just don't see the logic in buying things two, three, four times - particularly with chincier build quality and greater cost each time around.
Fix up that bad boy!