Hi Bob. I've fired up a 14" WSM for the first time today and I'm running it with the stock water pan to see how it holds temps. My first thought about a shallower replacement would be a round cake pan or a deep dish pie pan. According to the specs, the stock water pan is 11.5" in diameter but what will matter most is how far the metal tabs on the grill straps that hold the water pan extend into the cooker. I think most cake and pie pans run in single inch increments so finding an 11.5" pan might be tough. On the other hand, a 12" diameter pan might fit if you don't plan to use the lower cooking grate. I do have a 12" round cake pan and I'll try it out once my temperature tests are done and the cooker cools down.