Go to Parts Express and pick up
Audtek Pure Copper Audiophile-Grade 16 Core Interlaced Braided OFC Hi-Fi Speaker Wire 11 AWG
Clear insulation is polyethylene, white is teflon
Then find some terminations of your choice.
You'll have your $500-$1000 cables (at least one other supplier is selling finished cables for that) for a fair bit less.