Call some Pro dealers like Sweetwater and ask for silver cables. Get back to us with how many you found. For extra points do the same with manufacturers of pro equipment who use silver where copper would suffice. That should keep you busy for a while.
Do Recording Studios Use Silver Cables
Some of the best cables are made of pure silver. Do recording studios use silver cables? I would think that top recording artists would want to use the cables that sound the very best.