We did something like that as well. Cost was comparable to just buying rings (most of that was the gold, anyway). We started with a blank strip of metal with th

We did something like that as well. Cost was comparable to just buying rings (most of that was the gold, anyway). We started with a blank strip of metal with the correct cross-section, which was first bent, then soldered together, then sized appropriately and polished. Was a fun day.