[Mikko Peltonen]

I'm thinking of creating my own balanced headphone cable and for that I need cable that has two individually shielded and insulated conductors in a circular shell. The overall diameter should also be as small as possible, anything over 5 mm is getting a bit bulky and hard to use.
 
Here's a image for reference.
 

 
Any suggestions? I live in Europe so I'd prefer to order from here. Thanks!