Campagnolo Track Pista cranks with inch-pitch chainring

First the good news : this auction is for a used, but pretty nice set of Campagnolo 170mm pista (track) cranks from the 1960s with a 26 tooth, inch-pitch Campagnolo chainwheel; nice Campagnolo dust caps; and 5 blue anodized non-Campy chainring bolts. Pedal threads are 9/16". Now the bad news : the non-drive (left side) crank has a crack in it (see close-up picture)--it will be okay for a display bike, but IT SHOULD NOT BE RIDDEN . If you want to ride these cranks, you will have to find a matching, usable left crank.