All the parts you need are still available from Honda. I'm not sure if you're familiar with the on-line OEM parts websites, but there are dozens of them. I use this particular one because they are local to me, and I can order on-line for internet prices, but then pick up locally to avoid shipping. Do a google search and you'll find lots of sites (they pretty much all use the same catalog system with the same diagrams).
This is just an example:
http://www.cyclepartsnation.com/oemp...le-lever-cable
Look at parts 28, 29, 30, and 35 should set you up nicely. Minty fresh!
- Frank
1984 200ES Big Red
1985 350X (x2)
1986 350X
1986 250SX
1984 Auto-X
1984 ATC70
1985 ATC70