Here:
https://secure.lodgemfg.com/storefront/product1_new.asp?menu=logic&idProduct=4044
You can buy them direct from Lodge for full price. We have a regional discount chain in these parts called Bi-Mart that always has them, and I have seen them in the camping section at Wal-Mart.
Thank you Dave!! I will check at the local hardware store, Fresno Ag. It seems like they have every Lodge piece ever made. Cast iron rules! Did you know it adds iron to your food?