broken lumbar knob

ok, the seats in my 99 Blazer have the knobs to adjust the back of the seat, and both of them are broken. not the handle that just pushes them all the way up so people can get in the back (2 door), the spinny knob thing lol. Anyways, they spin freely.. I looked around down there, and found that they apparently work with a tension cable which has snapped. I can't seem to find just the cable anywhere. Does anyone know where to find them, or will I have to replace the seats?

If all you need is the lumbar cable, the dealer is where you'll need to look. To replace the cable, the seat back cover comes apart at a plastic joint across the bottom, undo the "connection" then slide the cover up just high enough to replace the cable.

awesome, thanks