vpme.de (Vladimir Pantelic Musikelektronik) has released trig31, a Eurorack 8-channel trigger to MIDI converter in 4hp. A spokesperson told us, "trig31 let's you hook up all your (old) MIDI drum machines and drive them from triggers created in your rack. It's fully programmable with channel, note and velocity per trigger."
Pricing and Availability:
See vpme website.
Affordable workstation type keyboard