The lines can be ordered from any Paragliding Pro repair shop in the country regardless of the brand. The lines are custom cut. Look for your glider on the manufacturer's website. Take a screen shot of your wing diagram. Indicate which line(s) is/are to be replaced - make a red circle on the line to be replaced or some kind of marker. Provide the wing brand, model, year, size to the Pro shop. The line(s) will then be mailed to you. If you do not feel confident replacing it/them yourself, ask your instructor to do it for you (recommended). Note that there can be small variations in line length(s) and the Pro shop knows it. Any doubt, contact the shop, they will answer your questions.