Neotech NEVD-2001 Pure Silver digicable. It's not even expensive so you don't need to look for used..though I've never seen this model on the used market. I would describe it as "liquid"...how you like that lol.
The Neotech certainly isn't in the price range of a Sigma so many people will probably roll their eyes at the $300 price tag. Actually I think they are even cheaper these days but I feel it's one of those cables that one should try if they can't afford the heavy hitters. The connectors on it are worth the whole cable price in my opinion.