Galfer does make some good SS brake lines. The listed model for ~$65 should fit all the disc brake TWs.
So do others.
Lots of other options in varying lengths, colors, vendors, banjo angles, etc starting at around $13 on Amazon for example.
eBay also has numerous listings last time I checked. Motorcycle Triple Protection Brake Line, 10mm 28° Port, 300mm - 2400mm Length (Blac...