I'd skip any adapters entirely if I were you. I wouldn't want any signal degration on the Mojo and any components added in the chain will degrade the sound most likely. You can call cable companies and they would make one for you in custom legnths. Blue Moons, Kimbre, Audioquest, Audience are a few cable companies. Although besides blue moons are cable companies geared more towards stereo speaker setups but you never know. I'd give blue moons a call first and get a quote.