I have a Sonuus G2M. Not perfect (only midi channel 1, doesn’t allow to play chords but for A4 it’s not a problem for now) but it allows to play midified machines with a guitar. I never tried to play A4 with it but played Evolver and it was very funny for a guitar player like me.

I know this is not really the subject of this post but if you are of if you have guitar players in your band it could be interesting to allocate the channel 1 of your A4 to cosmic guitar solos.