Jagwire makes the cable liner in black or clear, comes on a roll, any LBS should have it. Alternatively, take the cheapest leftover piece of line shift cable you have and cut the casing, strip the wires and voila...clear teflon liner tube.

Deda 215 would be my choice for 26.0 bars.

Campy 10 (Centaur) or 11 (Athena) would be my choice for silver components.