Flysurfer has the right idea with pulley lines. They include a set with the kite and make it known they are a wear out part.
Ozone and FS include some of the through the bar wear out lines with new kit.
Maybe other manufacturer does not include. Pulley lines and through the bar lines wear out. It still has a cost up front or on the back end.
Buy from the dealer, buy somewhere else or make your own. Annapolis Performance Sailing charges $14 to do an eye splice. 2 splices plus line and shipping and you are in the same ball park as a free line paid shipping from Europe. Nobody is getting rich on these line replacements and their time has a value.
Some customers should come with a warning label.