Amazon.com : Farbetter Lined Bicycle Bike Derailleur/Shift Cable Housing, 4mm x 50ft, Including 50 PCS Cable End Caps Kit, The Most Trusted DIY Set for SRAM/Shimano Mountain Bike Road Bike (Black) :
Box One Shift Cable & Housing Kit
How to Size and Install Shift Cable Housing | Park Tool
Bicycle shifter, brake cable, and housing standards | BikeGremlin
EB16: Jagwire cuts serious weight from cable housing in more ways than one - Bikerumor
How to Size and Install Shift Cable Housing | Park Tool