how much wire do you need? i'm a welder. might be able so snag some stainless tig welding filler rods at work if there is any. stainless and copper is expensive and they keep track of it like a mofo.
every guitar manufacturer I can think of uses nickle.
Except for parker.
Which sound way too fucking bright.
and have you ever tried to crown and fret dress stainless steel? have fun with that. Nickle barely wears at all. you might haveto replace a fret in what... 10.. 15 years from now?