Is there a generic CC to SysEx Yamaha Controller Script anywhere?

[hockinsk3]

For a while I've been mapping Bitwig CC to Sysex outside of Bitwig in order to control the older Yamaha synths. Has anyone written a Yamaha Controller script? ie so that Bitwig can control Yamaha from CC at the Controller? I've had a look and not had much luck. The Bitwig API would appear to be able to deal with Sysex within the controller, but not within Bitwig arranger itself.