Yeah dude, get a B&M or something, they work well. Just an FYI don't get the cheapie plastic POS that
looks like chrome...unless you're on a tight budget, of course.
If you're referring to the "kickdown rod" for a C4 trans, just read the FAQ's on a transmission-based site like Lentech or Baumann Engineering. I'm not exactly sure about it, but I believe the stock cable can be modded to work (welding & fabbin' required). If not, try various years and models of pickup truck parts. They're cheap and in ready supply at junkyards. They used the three-speed automatics for a looooong time after they stopped putting them in cars.