>But their thinnest wire (1/16") is not their most flexible. And their
>most flexible, is at least 3/32" thick. Those are the best I've found
>so far, but I'm looking for something thinner if possible, maybe 1/32"
>or 1mm thick.

How long does it need to be?

I am thinking of the wire rope used by pushbikes (cycles) for operating 
bakes and gear change. Also throttle and choke cables in (very) old cars. 

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