Kitfox Aircraft sells the appropriate length model four high quality cable and you can get a fantastic Vernier throttle cable from McFarlane Aviation Products.

Check with Debra at Kitfox Aircraft for either. Not sure if they are a dealer yet for McFarlane Aviation Products. We are using their venier throttles on our Phoenix built and based Kitfox. They are a high quality throttle system and the pilots I’ve talked to that use them all love them.