Amazon.com: GELRHONR USB MIDI Cable Adapter, USB Type A Male to MIDI Din 5 Pin in-Out Cable Interface with LED Indicator for Music Keyboard Piano to PC Laptop Support XP/Windows7/8/10/Vista-6.5Ft : Musical
Amazon.com: SANOXY USB MIDI Cable Converter PC to Music Keyboard Window Win Vista XP, Mac OS X : Musical Instruments
Cheap USB MIDI cable: some self assembly may be required – arvydas.co.uk