Penn Elcom 1M Y Lead Cable 3.5mm Stereo Jack to 2 x 1/4" Mono Jack NRA-031-0170-010 PennElcomOnline.com
Williams Sound 1/8" Stereo Jack to 1/8" Mono Plug Adapter ADP
Amazon.com: tisino 1/8 to 1/4 Stereo Cable, 1/8 Inch TRS Stereo to Dual 1/4 inch TS Mono Y-Splitter Cable 3.5mm Aux Mini Jack to Jack Breakout Cord - 6.6 feet : Electronics