You can buy silver cartridge leads on eBay. They are a product of either Yamamoto or Oyaide; in other words, the source is reputable. No need to purchase an entire headshell. In fact, I don’t know of any of the better Japanese-made headshells that come with silver leads. @lewm
This is a nice set of Silver Lead Wires made by Audio-Technica, i think they are from the 80’s. I’ve bought two sets (NOS). Has anyone else tried them ?
There is a nice Audio Craft headshell which i am happy to use on high mass tonearms. That models designed to solder leadwires directly to the headshell pins (less connectors in signal path). This is a dual-lock headshell. I think it's top quality.