[Elecraft] Amplifier Cable:K3 to Alpha 8410

[pastormg2 at verizon.net]

It was suggested to connect my K3 to my Alpha 8410 that I could purchase a shielded cable from Radio Shack.  I need one end to be a phono plug and I assume that the end that connects to the K3 is also a phono plug.  Does anyone have any suggestions looking through the Radio Shack website as to the cable that would work the best.  Thanks for your help!  Mark KB3Z