^ NICE! i'm still leaning towards 100% cotton tubing, simply b/c it may be softer, may lead to less cable vibration noise (as in sound comeing through when you rub against it) maybe more flexible, buuuuut boy this stuff would be a lot less work seeing as how i'd have to dye the cotton...
that said, here's a few good sources i have found on my quest to build a super thin, flexible, and nice looking lcd-2 cable... maybe you all know about some of these already.
http://www.partsconnexion.com/heatshrink_tubing_cotton.html - this place sells 1/10" o/d cotton tubing.. the smallest i've found
this place just has all kinds of good stuff - cotton and silk tubing, along with great wire sheilding, techflex, fiaments, cables and more...
http://www.fabric.com/ProductDetail.aspx?ProductID=cde49a2b-cac6-4ac5-b4ff-2d7849664b3d
http://www.fabricfarms.com/Cording.html