The Ozone Kite Surfing Quad Lines set would fit all 4 line ozone kites and most other brands too.  There are several lengths depending on your requirements.  The standard size that ships on the kites if 25m on all apart from the Zephyr which has 27m

The Ozone Kitesurfing Linesets are 2 x 500kg (1100lbs) for the front lines and 2 x 300kg (660lbs) for the back lines. The highest quality Dynema available, no stretch, thin diameter and coated to unwind without tangles.

500kg 300kg 20m Quad Line Set £99.95
500kg 300kg 25m Quad Line Set £119.95
500kg 300kg 27m Quad Line Set £129.95