NUSofting has released Peti SA [AU/VST2] [Mac/Windows] [64-bit/32-bit].
Peti SA replaces the previous Peti Harmonium / Accordion with an improved sound engine and many new features.
Price: $54.00 USD. There is a Holiday Sale of $40.50 USD until January 16th. The upgrade for Peti 2.1 users is available on request for $12.00 USD.