Lester Hawksby's suggestion [170604 MMDigest] of using copper brake
line tubing in player pianos is an excellent one (if it can be had
in thin-enough diameters).  It comes in large quantities without
end fittings pre-attached (look it up on-line), bends beautifully
without kinking, and ought to last "forever" in this application.
Also, a variety of benders for it are available from auto parts
suppliers.

Gordon Stelter
Athens, Georgia