These work amazingly well at an astonishing price:
https://www.homedepot.com/p/Commerci...0127/300513196

I always use a cut off disc with a Demel style tool to finish of the cable housing ends; especially after curving the cable housing on the compressionless style "SIS" derailleur cable housing at the chainstay cable stop to derailleur body section- eliminates any play for crisp, precise indexed shifting.