Andy B.
After going to Home Depot twice, the first time being helped by someone who gave me the wrong item and the second time they just couldn't tell me what I needed, I finally went to Gorman Cooler Supply. It took about two minutes in and out and it cost me about $40 less, and it was the right item.
I made a note of this so when I need cooler parts or supplies in future that's where I'll go from now on.
Glendale Arizona