source of cheap narrow thin tube?

[nova_robotics]

Thanks all, I will look at the tubing options. Whatever I use has to have some rigidity similar to a tig rod since it needs to support itself, and a small weight at the end of being cantilevered.

What about wire + a tig rod for stiffness + a few layers of heat shrink to pull it all together?

I've used wire loom that's like a Chinese finger trap before. I generally hate the stuff, but it might be useful in this particular application. You can get it in nylon, probably some other plastics, stainless, and I also have tinned copper out in the shop. It's a pain to deal with, but if you're only going short distances it might work out.