If you just want the little doughnuts, they can be purchased either in the cable sets, or individually. Jagwire, Shimano, etc., have them available. I try to stockpile them when they are included in the prepackaged cable kits, they harden and crumble over time so a few extras are welcome. One use for them is as a form of seal where cables run into the frame tubing, also. Not the best, but it is nice to have if you are ride in the rain or gritty, dusty roads a lot.

The inner cable from a housing that [MENTION=426321]Chombi1[/MENTION] recommended, is the best idea I have received in a while, when I asked here about finding some small diameter tubing for my Tommasini this was recommended to me. No cost, works great and does the job with no fuss or muss.

Bill