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https://www.crownperformance.com/
They make the top-tier brake line sets for brands like klm, pmf, etc...
Wherever you choose to source them, this is the brand I'll always recommend. Actual stainless steel.
I had the Russell set, and the fronts lasted about 3 years before the rigid section at the caliper rusted to the point of embrittlement.
That part is galvanized steel and I suspect heat cycles cooked off the zinc. or maybe mine were a Friday set.