https://www.google.com/search?client...ap+brake+lines
There are tons of reputable brands and lots of non-reputable ones haha. I wouldn't hesitate to use the GKTech, Chase Bays, P2M, Stoptech, Diftech
If you wanted to be weird and anal you could get the short hardline and bracket that the S14 K's/S15 Spec-R have attached to the strut to mount the "Z32" caliper and then use OEM lines for an S14 K's/S15 Spec-R. But that's a level of overboard OEM-ness that even I wouldn't bother with.