I went looking for a replacement for the very deep stock water pan, and since I am just using it as a grease catcher, I got this pizza pan, which fits perfectly...plenty of rim to engage the supports, and tons of room for charcoal underneath. In case anyone's interested....
https://www.amazon.com/dp/B0DLRCR1WQ?tag=tvwb-20
https://www.amazon.com/dp/B0DLRCR1WQ?tag=tvwb-20