I tried direct linking originally, but the forum software somehow mangled it up. Try a cut 'n paste with this:
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_43572_43572&issearch=3309048
I know there are other sources, but this is a quick example. I bought mine from a local towing supply house...called a local wrecker and asked him where he buys his t-hooks, j-hooks, etc.
-Steve