Amazon.com: TNP Cable Adapter 5 Pin DIN Plug Male (180 Degree) to 3.5mm (1/8in) TRS Stereo Male Jack Cable Converter for Vintage Stereo Radio Audio Equipment Signal Output 3.5M - 5 DIN
Updated] How to Make Your Own 3.5mm mini stereo TRS-to-MIDI 5 pin DIN cables -