I have some samples of that coming. It's not clear, though. He's talking about the Daburn 2671. Min 100' (I just added that to the sheet. Sorry)
I would definitely be interested in what you think of it. I might be convinced to ditch the clear if the flexibility is really good.
I haven't tried it, but you might this Silicone Cover Stranded-Core Wire from AdaFruit. Pretty cheap. 2m for $1