What about squeezeboxes? I know there are some great accordion family instruments in Argentina, such as the bandoneon and the gaita ponto (this link gives just enough of the latter to be seriously frustrating when it stops.

Maybe now would be a good time for the music of Argentina to come more to the attention of the rest of the world. Paradoxically, that was one of the effects of the worst time in Chile after the CIA backed coup.