I don’t have any immediate solutions for this topic, as I’ve never personally attempted things. However, based on my experiences with other plugins, one of the bigger contributing issues is that the messaging is stored as an option in the wp_options table. If there is some way to tell either of those plugins potentially where those are, and if they can work with that, then that may be a way forward. However, I can’t guarantee that that’ll work or is even possible.
Sadly, beyond that, I don’t know what to suggest to help in this case, with the current status of the code, but I’m all ears if any knows how to translate saved options.