Russell,

When I'm looking for genuine stainless steel items and not just something that's corrosion resistant and given the name stainless steel for marketing purposes I go to a boating supply store. People with those rather expensive sail boats tend to get a little pissed if their rigging gear starts rusting when they were told it wouldn't. Another advantage is such gear is probably of an alloy to withstand very salty conditions (eg ocean or vagina )

Not saying that all gear there would be what you need but that's where you're most likely to get what you're looking for.

There's a great store where I'm from that I've been to that's very small-townish and personalized. I've bought several rings and clips not to mention a hundred or more feet of soft rope from him. He asked me if I owned a boat and I said no. *grins* It's one of my more favorite shops to go to.