Cable sheath wanted

[ChrisCar6]

I need about 18" of cable outer to accommodate 4mm inner - brake bias adjuster. The off cut of handbrake cable is just too narrow. Anybody have anything suitable?

[turbonutter]

Throttle cable or pull cable outers i have, but nothing that size....

How about a new cable http://www.rallynuts.com/motorsport-ancillaries/obp-remote-cable-bias-bar-adjuster.html?currency=1