No info about availability.
Thomas Henry SN Voice
Synth Voice based on the Texas Instruments SN76477 chip. Designed by Thomas Henry.
Thomas Henry SN Voice$189.80
Output SN6600CA$69.99
Roland R-8$198.20
Roland R-8$294.30
Roland R-8$174.18
Roland R-8$174.18These merchants probably sell this module. Huh?