C-clips can be bought at Lowes, Home Depot, Ace hardware.....generally any good big-box location. They uually have them sorted by thickness and/or dimension. you could also try at McMaster-Carr....they carry just about anything you would ever need in the way of hardware. Any of these stores could probably help you with your need. They are also lot cheaper than any "parts house" supplier you may use. Good luck.
