Hard to beat magnet wire. painted on enamel dialetric, high purity, cheap, good sounding. You can buy surplus and DIY for just a few bucks.
If you want them ready-made, your can order some "Anti-Cables" from Paul Speltz (Agon). I like these better than any of the other cables I've tried on my Maggie 1.6's. Mine are bi-amped, and I've tried Analysis Plus, Audioquest, Harmonic, and a couple of others. The Anti-cables were good enough that I no longer look at alternatives.
They really do sound outstanding with Maggies!
HTH