Cheap Shock Cord
I'll tell you how to get shock cord for cheap!
Obtaining Cheap Shock Cord
It happens to all of us. We build an Esties model rocket, launch it a dozen times and then the shock cord gets ripped/burned. Esties sells replacement cord for $$. Many people don't realize that shock cord is actually 1/4" elastic, which you can purchase at any fabric store. Better yet, it's available in the sewing/craft section of your local Wal-Mart.