FT232RL USB TO MINI DIN 8P MD8 ADAPTER RS232 SERIAL CABLE FOR KORG X5(D) MIDI MUSIC SYNTHESIZER TO HOST PORT AG-001 FOR PC (FT232RL CHIP) Cable length:3m - Newegg.com
Amazon.com: DecaBox MIDI to RS232 Bidirectional Converter : Musical Instruments
STM32F042 based USB to MIDI or RS-232 Interface
Wintergalen Elektronik - rs232-midi-konverter-wgp64