I decided to repair the cable with bicycle parts. The cable housing was badly damaged, so I bought a piece the same size from a bicycle shop. I also bought a shifter cable and a cable ferrule to attach the old Z-end to the new cable. After assembly, I made sure that cable and housing wasn't being pinched when the seat back was laid down, which caused the original cable to break. I tried to find a cable with the same size barrel end (5x8 mm), by settled on the shifter cable with a different end. Be careful when when reaching under the seat, there are a few sharp edges that can cut your fingers.