I am looking for a supplier for a tank head type dome made of 304 stainless that has reasonable prices for a one off order. I want to build a prototype of something and if it works well I'll be order more. I'd like to have an ID of 16" and a dome height of around 4". I have been through most of the products at toledo metal spinning and haven't found anything off the shelf that will work. They could probably make one for me but that could add up quick. Thanks.