I applied a negative dB gain to the “echo” effect which produces the signature robotic 3PO sound. This gives it a more subtle effect, perhaps more in-line with the film. Provided it isn’t too long, I think this should be a nice fit for the scene:
https://drive.google.com/file/d/13z4agN3MprM1wpB02H2wlgjbK7qBU-4J/view?usp=sharing

It would be possible to do that for Finn, at least audio-wise. But I seriously doubt there is suitable footage for such a thing. Which is a shame, because I agree that it would be incredible.