Sources of stainless molds
The place I got my stainless mold is Fraser Kiln http://www.fraserkilnmolds.com/WeavingMolds.html. However, I noticed that Slumpy’s also is carrying them.
When I saw them at Fraser, I seriously looked into stainless roofing material that is wavy. I had a local roofer who was willing to cut a piece for me out of extra material, but it turned out that he had long pieces that were only 3-5 inches in width.
Certainly, you can simply lay the rods/strips on top of each other and fuse, but I like the ability to interweave the colors and come up with variations that can sometimes be surprising.
I also found some wavy stainless steel soap dishes at one of the local bath stores and have used that with good success for smaller pieces.