Louise, Companies that specialize in boat/marine hardware
almost always carry a wide variety of stainless steel cable, from
very, very fine to HUGE. That's where I get mine. Unfortunately I
am in Singapore so I don't have a US source for you.
I missed this post but try the aircraft industry. Look in the phone
book for suppliers usually located around the local airport. They
carry all sorts of stainless steel cable. Things you can’t even
imagine. Strapping as well as cable. Frank Goss