I had to go into the Dollar Store with my wife. I usually find nothing to buy in the store but I noticed something that might be of interest to Casters. The store had a steel six place muffin pan for $1.00. The pan was fairly heavy metal and was stamped out.
I have an old muffin pan that has inserts for the muffins and one or two has come out of the pan. This one would make a good ingot mold especially if you let it rust.