General Source for wire (1x7 stainless preferred)

[NickfromWI]

I am starting to use cable to brace trees. I have some hardware that I really like:

http://www.rigguyinc.com/cms/

I want to know if you folks know where one might buy 1x7 stainless wire. I can get locally something called EHS 1x7- but I have some sea-side folks that are concerned about corrosion. I offered stainless as something to consider, and said I would look into it.

Does stainless 1x7 exist?

love
nick