Try Ascendant Cables. You can get them from www.ozenterprises.net

I should also note, just to heat up the discussion...

A cable has inductance, capacitance, and resistance...correct?

A loudspeaker crossover has inductors, capacitors, and resistors....correct?

If a cables dont make a difference, thats like saying slightly varying the crossover components doesnt make a difference.

I may be wrong, but its just my little theory.