[vcf-midatlantic] Need an Ensonic Music Keyboard for the museum

Starting a quest for an Ensonic keyboard with MIDI for use in with our Atari STe music computer in the museum. Something with the 5503 oscillator chip or otherwise containing silicon from Ensonic Semiconductor Group. http://archive.6502.org/datasheets/ensoniq_5503_digital_oscillator_chip.pdf Specifically want Ensonic for the local connection to Malvern, PA. Please contact me off list for any available item to work out an arrangement. Thanks very very much. DC