Cmusic Production has updated the Vintage Bandoneon library to volume 1.2 for Kontakt 5. The Vintage Bandoneon Library contains a large number of samples in four layers with 4x Round Robin. Velocity is regulated by modulation (CC1), making for smooth transitions between layers. Special "hidden" velocity-controlled Round Robin accents come in two versions: soft and hard.
Details:
Added mechanical vibrato:

• Use Sustain Pedal (CC64) to contol sound between non vibrato and mechanical vibrato.
• Intensity mechanical vibrato – CC18.
• Frequency mechanical vibrato – CC19.

Price: $39.

Astor Piazolla was pretty amazing. Libertango is his most famous piece and a Jazz standard. His central Park concert is fantastico.
https://www.youtube.com/watch?v=fFqQ6OULLPQ
 
GOTAN project sampled him a lot for their work
 
https://www.youtube.com/watch?v=JJu4mH0Te9s
 
A good sampled Bandoneon is an interesting option if you like the Argentinian sound.

Absolutely. Love that Gotan Project and Astor Piazolla. Doesn't get more authentic than that.