Antimatter wrote: and it's no longer in production.
Why does that matter? I've got several dozen synthesizers that have been out of production for 20+ years
Basically, I need a Roland Gaia SH-01 with some more keys maybe an acoustic piano sound.
The Gaia is a virtual analog synth. Most virtural analog synths are not going to have traditional piano & organ sounds. However, the Gaia does have General MIDI soundset (many traditional sounds like piano and organ) available via MIDI.
The Korg KingKorg is a 5 octave virtual analog synth with some sampled sounds like piano, Mellotron, etc. They're going for around $800 used.