Well we have a winner! I wasn't able to find the parts are O'Reilly's or Autozone but I did find them at Pep Boys. Here is the one(s) that I originally purchased:
The package has 3/8" and 5/16" clips but they aren't the right size or form. These are the correct ones.
And these are the way the look. The one on the left is the new one. The one on the right is the original. You can see the product ID in the corner in case you need some for your truck.