They should already have nanotube cable of any length on the market
In medieval times, when methods to draw metal into long wires had not yet been developed, they made chains instead. And chain maille. This is a hobby for some people, who have fashioned micro-maille with tweezers and a magnifying glass:
Making half-persion 4-in-1 chains
There are machines that make this stuff, it isn't all hand-made.