To decorate your garden with stainless steel is a brilliant idea and it looks superb! Personally, I would go for It and try to manufacture some steel metal art pieces myself. It’s about to get a few right tools for the particular job and start playing around.
Garden Deva Sculpture Company of Tulsa, Oklahoma creates superb and whimsical steel art and yard sculpture. See them on the web at http://www.gardendeva.com.