Sound Libraries for Vintage MIDI Synths

Sound libraries are still available as Sysex files for
01/W, SY-85, JD-990, ESQ-1, SQ-80, TX81Z, D-50, D-550, VFX,
VFXSD, SD-1, Proteus/1, Proteus/2, and Wavestation.

SQ-80 and ESQ-1 sounds compatible with the VSTi SQ-80 emulator
available at http://www.buchty.net/ensoniq/

Cartridges are no longer available, but they occasionally show
up on eBay and sell for more than the original retail price.
Not sure what that means, but hey those things are about 20
years old now.

http://www.cesiumsound.com