There is no 32 bit verison of Revoice Pro 4.3
A 32 bit download for Revoice Pro 4.2 can be found in this legacy installers article:
https://synchroarts.zendesk.com/hc/en-us/articles/22319520396055-Synchro-Arts-Legacy-Installers
There is no 32 bit verison of Revoice Pro 4.3
A 32 bit download for Revoice Pro 4.2 can be found in this legacy installers article:
https://synchroarts.zendesk.com/hc/en-us/articles/22319520396055-Synchro-Arts-Legacy-Installers