Interest Check] Super37 - CV Keyboard w MIDI - DIY Kits - MOD WIGGLER
DIY Keyboard Controller for MAME and Virtual Pinball : 4 Steps (with Pictures) - Instructables
SJ@JX Development Keyboard Encoder Board Game Controller DIY LED Keyboard Development Board Media Music USB Encoder 104 Keys Arcade DIY Kit : Amazon.it: Informatica
This is how I build my own MIDI controllers for less than US$40.00 (and how you can build yours, too - The Nerd Musician