I have a solution that will do this by exporting the data as a vCard, you can find an example here
The example only does one record at a time but it is easy enough to modify the script to loop through multiple records.
We have proprietary AppleScripts that export contacts to the Apple Contacts database. We would be willing to implement in your solution for a licensing/development fee. Contact me back channel if you're interested. - firstname.lastname@example.org
If you want to look into an AppleScript based solution this should help you get started:
There are also a few plugins that handle this:
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Thank you Chris, Tim and Andrew. I'll look into these options and let you know how it goes.
All the best,