I am not aware of an interface adapter that comes with the 1/8" connector at this time. You can get the PIE HON03/PC-SON and the 3.5RCA-6MM Patch cable.
http://www.andersonelectronics.net/piehoauxinco1.html
http://www.andersonelectronics.net/pie3aupaca3t.html
Good Luck